Alexander Bublik

On the junior tour, Bublik reached a career-high ranking of No. 19 and won eleven titles (six singles and five doubles) on the International Tennis Federation (ITF) junior circuit.

Bublik began 2016 ranked World No. 964. He won his first Futures title in Doha in April 2016, followed by titles in Moscow, St. Petersburg, and Sweden.

Bublik made his ATP main-draw debut at the 2016 St. Petersburg Open, where he received wildcards into both the singles and doubles main draw.

Bublik qualified for the Kremlin Cup, where he notched the biggest win of his career, upsetting Roberto Bautista Agut in straight sets in the round of 16. He then lost a tight three-set match to the eventual champion Pablo Carreño Busta.

In November 2016, Bublik announced that he would represent Kazakhstan.

By the end of the year, Bublik's ranking had skyrocketed to No. 205.

After qualifying for the Australian Open, Bublik defeated 16th-seeded Lucas Pouille in his first Grand Slam tournament match.

In February, Bublik won his first Challenger title at the Morelos Open, defeating Nicolás Jarry in the final.

At Wimbledon, Bublik received a spot in the main draw as a lucky loser. He was defeated by world No. 1 Andy Murray in his first Wimbledon appearance.

Bublik won his second Challenger title in Aptos. In September, after making the semifinals of a Challenger tournament in Istanbul, Bublik broke into the top 100 for the first time, reaching a career-high ranking of No. 95.

Bublik struggled for much of the 2018 season, seeing his ranking drop into the 200s. However, he prevailed in his last event of the year, winning eight matches to capture the Challenger title in Bratislava.

Bublik was successful early on in 2019, winning his fourth Challenger title in Budapest, followed shortly by another title at Pau.

Bublik earned his first Masters 1000 win in Miami, winning two qualifying matches and defeating Tennys Sandgren in a third-set tiebreak.

His next tournament was in Monterrey, where he again defeated Sandgren in a third-set tiebreak en route to his sixth Challenger title. This win propelled Bublik back into the top 100.

Bublik won his first French Open main-draw match over Rudolf Molleker, before losing a close four-set contest to eventual finalist Dominic Thiem.

At the tournament in Newport, Bublik reached his first ATP final, where he was defeated by the top seed John Isner.

Bublik had a successful US Open campaign, where he won two consecutive five-set matches. He came back from two sets to love down against Thomas Fabbiano to reach his first major third round.

Bublik reached his second ATP 250 final of the season in Chengdu, where he defeated top-30 players Taylor Fritz and Grigor Dimitrov, before losing the final in a third-set tiebreak to Pablo Carreño Busta. The result helped him to reach a new career-high of No. 48 in November.

At the 2020 Australian Open Bublik reached his first semifinal at a major in doubles partnering fellow Kazakh Mikhail Kukushkin where they lost to Rajeev Ram/Joe Salisbury.

Bublik reached the semifinals of Marseille, where he lost to Stefanos Tsitsipas in straight sets. As a lucky loser, Bublik reached the quarterfinals of Hamburg, beating Albert Ramos Viñolas and Félix Auger-Aliassime, before losing to Cristian Garín in 3 sets.

He had his first top-10 victory against Gaël Monfils at the 2020 French Open, but lost to Lorenzo Sonego in the second round.

Bublik started his 2021 season at the Antalya Open. Seeded eighth, he reached his third ATP 250 final, notching his second top-10 victory against top seed and world No. 10, Matteo Berrettini, in the quarterfinals. He was forced to retire in the final after trailing 0–2 in the first set against Alex de Minaur.

In the Great Ocean Road Open, he lost in the third round to Stefano Travaglia. At the Australian Open, he lost in the second round to Dušan Lajović in 4 sets.

He reached his fourth final in Singapore after beating Altuğ Çelikbilek, Yoshihito Nishioka and Radu Albot. He lost to Alexei Popyrin in the final.

At the 2021 Miami Open, Bublik reached the quarterfinals where he lost to Jannik Sinner. This marked his best result at a Masters 1000 event to date.

At the 2021 Madrid Open, he defeated Denis Shapovalov and Aslan Karatsev to equal his previous Masters 1000 result, but lost to Casper Ruud. As a result, he achieved his career-high ranking of World No. 40 on 10 May 2021.

In only his sixth appearance at a major in doubles, Bublik reached his second major doubles semifinal in his career at the 2021 French Open partnering with fellow Kazakh Andrey Golubev defeating No. 5 seeded Ivan Dodig/Filip Polášek (second round), No. 11 seeded Wesley Koolhof/Jean-Julien Rojer (third round) and Hugo Nys/Tim Pütz (quarterfinals) en route, his best showing at this major. In the semifinal the Kazakh duo defeated the Spanish duo Pablo Andújar/Pedro Martínez who were both making their major semifinals doubles debut. They played in the final against the French home favorites Nicolas Mahut/Pierre-Hugues Herbert, but they lost in three sets. As a result, he entered the top 50 in doubles at World No. 49 on 14 June 2021.

Bublik started his 2022 season at the Adelaide International 2. Seeded sixth, he lost in the first round to Australian wildcard Aleksandar Vukic. At the Australian Open, he was defeated in the second round by 17th seed and world No. 20, Gaël Monfils.

In February, Bublik reached his fifth ATP singles final at the Open Sud de France in Montpellier. Seeded sixth, he defeated Tallon Griekspoor, qualifier Pierre-Hugues Herbert, second seed Roberto Bautista Agut, and fifth seed Filip Krajinović en route to the final. In the final, he defeated top seed and world No. 3, Alexander Zverev, to earn his first career win over a top-five player, as well as his first ATP singles title. At the Rotterdam Open, he was eliminated from the tournament in the first round by Andy Murray. Seeded seventh at the Qatar ExxonMobil Open, he lost in the second round to Arthur Rinderknech. In Dubai, he was beaten in the first round by fifth seed and world No. 11, Hubert Hurkacz. Representing Kazakhstan in the Davis Cup tie against Norway, he won both of his matches by beating Viktor Durasovic and world No. 8 Casper Ruud. In the end, Kazakhstan won the tie over Norway 3–1 to reach the Davis Cup Finals. Seeded 31st at the Indian Wells Masters, he beat 2009 finalist and former world No. 1, Andy Murray, in the second round. He lost in the third round to 33rd seed and last year semifinalist, Grigor Dimitrov. Seeded 30th at the Miami Open, he was defeated in the third round by sixth seed, world No. 8, and eventual finalist, Casper Ruud.

Bublik started his clay-court season at the Monte-Carlo Masters. He beat 2014 champion, Stan Wawrinka, in the first round for his first win at this event. He retired during his second-round match against 13th seed and world No. 19, Pablo Carreño Busta, for no obvious reason. Seeded 16th at the Barcelona Open, he was beaten in the second round by Emil Ruusuvuori. Last year quarterfinalist at the Madrid Open, he lost in the first round to Miomir Kecmanović. Due to not defending his quarterfinalist points from last year, Bublik's ranking fell from 33 to 41. In Rome, he was defeated in the first round by lucky loser Marcos Giron. Seeded eighth at the Geneva Open, he lost in the first round to Kamil Majchrzak. At the French Open, he lost his second-round match to 28th seed, Miomir Kecmanović, in four sets.

Bublik started his grass-court season at the BOSS Open in Stuttgart. Seeded seventh, he lost in the second round to eventual finalist, Andy Murray. At the Queen's Club Championships, he was defeated in the second round by seventh seed, world No. 17, and two-time champion, Marin Čilić. In Eastbourne, he beat seventh seed, Frances Tiafoe, in the first round. He was eliminated in the quarterfinals by third seed, world No. 14, 2019 champion, and eventual champion, Taylor Fritz. At Wimbledon, he reached the third round where he lost to 23rd seed and world No. 28, Frances Tiafoe, in four sets.

After Wimbledon, Bublik competed at the Hall of Fame Open. Seeded third, he beat sixth seed, Andy Murray, in the quarterfinals. He then defeated Jason Kubler in the semifinals to reach his sixth ATP singles final, his second ATP singles final of the year, and his second Hall of Fame Open final. He lost in a thrilling final to fourth seed Maxime Cressy.

In August, Bublik played at the National Bank Open. He lost in the first round to Jenson Brooksby. Bublik then missed the Western & Southern Open, and the Winston-Salem Open due to the birth of his son Vasily. Returning to action at the US Open, he was defeated in the second round by 12th seed, world No. 15, and two-time semifinalist, Pablo Carreño Busta.

In October at the first edition of the Firenze Open, he defeated in the first round Cristian Garín for his 100th career match win. He was the second man representing Kazakhstan to record 100 tour-level wins in his career, after Mikhail Kukushkin, who had 172.

Bublik started his 2023 season by representing Kazakhstan at the first edition of the United Cup. Kazakhstan was in Group B alongside Switzerland and Poland. Against Switzerland, he lost to Stan Wawrinka. Against Poland, he was defeated by Hubert Hurkacz in three sets. In the end, Kazakhstan ended third in Group B. Seeded fifth at the ASB Classic in Auckland, he lost in the first round to David Goffin. At the Australian Open, he pushed 30th seed and world No. 32, Alejandro Davidovich Fokina, to five sets, but he ended up losing his first-round match.

After the Australian Open, Bublik represented Kazakhstan in the Davis Cup tie against Chile. He lost both of his matches to Nicolás Jarry and Cristian Garín. In the end, Chile won the tie over Kazakhstan 3–1. Seeded sixth and defending champion at the Open Sud de France, he was defeated in a dramatic first-round match by Grégoire Barrère. In Rotterdam, he lost in the first round to doubles partner Stan Wawrinka. In doubles, he and Wawrinka upset second seeded team Nikola Mektić/Mate Pavić in the first round. They lost in their quarterfinal match to Belgian qualifiers Sander Gillé/Joran Vliegen. At the Open 13 Provence, he beat fourth seed and world No. 25, Grigor Dimitrov, in the quarterfinals in three sets; he saved two match points in the third set tie-breaker. He lost in the semifinals to top seed and world No. 11, Hubert Hurkacz, who would end up winning the tournament. At the Dubai Championships, he was beaten in the second round by third seed, world No. 7, and eventual champion, Daniil Medvedev. During the week of 6 March, Bublik competed at the BNP Paribas Open. He lost in the first round to qualifier Wu Tung-lin. Seeded fourth at the Arizona Classic, he ousted defending champion, Denis Kudla, in the first round. He reached the quarterfinals where he lost to qualifier Jan-Lennard Struff. In Miami, he was defeated in the first round by J. J. Wolf.

Bublik started his clay-court season at the Monte-Carlo Masters. He fell in the first round to 13th seed and world No. 16, Alexander Zverev, in three sets. This was his first loss to Zverev after having led their Head to Head rivalry 2–0. In Barcelona, he lost in the first round to Emil Ruusuvuori. At the Madrid Open, he beat Daniel Elahi Galán in the first round after playing in the longest tie-break of the season so far. In the second round, he lost to sixth seed and world No. 7, Holger Rune, in three sets, despite having match point at 8–7 in the third set tie-break. Seeded sixth at the Open Aix Provence, he made it to the quarterfinals where he was defeated by French lucky loser Harold Mayot. In Rome, he reached the third round where he lost to world No. 4, Casper Ruud, in three sets. At the Geneva Open, he was eliminated in the first round by Marcos Giron.

In Halle, Bublik kicked off his grass court season with an upset over seventh seed Borna Ćorić, crushing Coric in straight sets. Bublik then emerged victorious in a close-fought hard three set win over Madrid Open finalist Jan-Lennard Struff, to reach the quarterfinals. Bublik, in the quarterfinals, defeated Jannik Sinner by a second set retirement after he had won a riveting first set to reach the semifinals of an ATP 500 for the first time in his career. He then defeated Alexander Zverev and reached the biggest final of his career. There Bublik played against third seed Andrey Rublev, with whom he had an 0–3 head-to-head record. Bublik sealed a thrilling three set victory to close out on the biggest title of his career and become the first Kazakh to win an ATP 500 singles title since Andrey Golubev's ATP World Tour 500 series title in 2010, in Hamburg. As a result, Bublik soared 22 spots in the rankings to No. 26, his career highest singles ranking on 26 June 2023. He further reached a new career-high in the top 25 on 31 July 2023.

Bublik received a code violation in the 2023 US Open for smashing his racket in a game against Dominic Thiem. He was criticized by the tennis community and fans when he was recorded saying "I am sick of giving careers back to disabled people" in Russian, an apparent reference to Thiem's recent recovery from injuries.

Bublik began his 2024 campaign at the Adelaide international ATP 250 event in January. He beat James Mcabe, Dan Evans, and 25th-ranked Lorenzo Musetti on his way to the semi-final, where he was beaten by Jack Draper in two sets. Bublik would suffer a surprise upset at the Australian Open 1st round where he lost to 137th ranked qualifier, Sumit Nagal in straight sets. Following this Bublik competed at the Open Sud de France in Montpellier which he had previously won in 2022. Bublik won the tournament claiming his fourth ATP singles title, defeating Denis Shapovalov, Alexander Shevchenko, Félix Auger-Aliassime and Borna Ćorić. Bublik lost the opening set in all four of his matches making him the only player to win an ATP singles tournament having lost the opening set of each match.

At the Dubai Championships Bublik was victorious in two close matches, first against Tomáš Macháč in the round of 32 then against 28th ranked, Tallon Griekspoor in the round of 16. In the quarter final his opponent Jiří Lehečka would retire after trailing in the second set. Bublik next faced world number 5, Andrey Rublev in the semi-final. In a closely fought match Rublev won the first set in a tie-break, despite Bublik having led at the beginning of the set. In the second set Bublik won in another tie-break. In the final set after Bublik held serve, Rublev shouted in the face of a line judge resulting in him being defaulted for unsportsmanlike conduct. As a result Bublik went through to the final where he faced Ugo Humbert. Bublik lost the final having been broken twice. Bublik received media attention after giving his racket to a ball kid in the middle of a match at the Monte Carlo Masters. He would go on to suffer a heavy defeat to Borna Ćorić losing in straight sets in the round of 32. In the following tournament at the Madrid Open, Bublik beat world number 15, Ben Shelton on his less favoured surface. Bublik would subsequently lose to Daniil Medvedev in the round of 16. Bublik reached a new career-high singles ranking of world No. 17 on 6 May 2025

At the Lyon Open ATP 250 event in May, Bublik reached the semi-final where he lost to newcomer and eventual champion Giovanni Mpetshi Perricard. Bublik went out in the straight sets at the second round of the French Open against Jan-Lennard Struff. At Wimbledon Bublik won in the opening round against Jakub Menšík after having lost the opening two sets. He then beat Arthur Cazaux in straight sets to reach the third round. Bublik would lose to world number 13 Tommy Paul in straight sets in the third round losing in three sets.

Bublik had a poor second half of the season, losing nine of his eleven matches from the Paris Olympics until the end of the season. This resulted in Bublik dropping from his career high ranking of No. 17 to No. 33.^[]

At the 2025 French Open Bublik reached the quarterfinals in singles, defeating ninth seed Alex de Minaur and fifth seed Jack Draper en route, becoming the first man from Kazakhstan to reach a Grand Slam tournament singles quarterfinal, where he lost to Jannik Sinner in straight sets.

In June, Bublik won his second 2025 Halle Open title. He reached the quarterfinals after upsetting defending champion world No. 1 Jannik Sinner in three sets, for the biggest win in his career. He then defeated Tomáš Macháč, Karen Khachanov and Daniil Medvedev to win the title and return to the top 30 as a result.^[] Seeded 28th at the 2025 Wimbledon Championships, Bublik lost in the first round to Jaume Munar in five sets.

In July, Bublik won two back-to-back titles, first at the Swiss Open Gstaad and the following week at the Generali Open Kitzbühel. In September, Bublik reached the fourth round of the US Open, where he lost to Jannik Sinner in straight sets. Bublik won his fourth title of the season at the 2025 Hangzhou Open and reached a career-high ranking of world No. 16 on 22 September 2025. He also joined world No. 1 Carlos Alcaraz (7 titles) as the only men with four or more trophies in 2025.