Alexander Blockx
Alexander Blockx is a Belgian professional tennis player. He has a career-high ATP singles ranking of world No. 95, achieved on 12 January 2026 and a best doubles ranking of No. 467, reached on 10 November 2025. He is currently the No. 3 singles player from Belgium.
Blockx won the boys' singles title at the 2023 Australian Open. He represents Belgium at the Davis Cup.
Early life
Blockx was born in Antwerp, Belgium, to a Ukrainian family background. He started taking tennis lessons in his early childhood with Philippe Cassiers.Junior career
Blockx had notable results on ITF junior circuit, maintaining a 108–48 singles win-loss record. In 2022, he reached the third round and then quarterfinals of major jr. events of that season, at Wimbledon and the US Open.The following year, Blockx reached the final at the 2023 Australian Open in both the boys' singles and doubles categories. Partnering with Brazilian João Fonseca, he was the runner-up in doubles, defeated by Learner Tien and Cooper Williams. Blockx gained revenge over Tien by winning the boys' singles final in three sets.
Although Gilles-Arnaud Bailly reached two major jr. finals in 2022, the last Belgian boy to lift a title at this level, prior to Blockx, was Kimmer Coppejans at the 2012 French Open.
As a result, he reached an ITF junior combined ranking of world No. 1 on 1 May 2023.
Professional career
2022: First ATP Tour matches
Blockx made his ATP Tour qualifying debut at his national tournament, the 2022 European Open in his home town, Antwerp, where he was given a wildcard. He lost to Swiss Dominic Stricker in straight sets.He was also given a wildcard into the main draw of the doubles, playing alongside Ruben Bemelmans in what proved to be Bemelmans' last professional match.
2023: More ATP matches, top 500 debut
In March 2023, Blockx made his Masters 1000 qualifications debut after receiving a wildcard for the 2023 Miami Open where he lost to Yosuke Watanuki.Blockx received a wildcard for the qualifying competition at the Antwerp Open and qualified into the main draw on his ATP singles debut. In his very first ATP Tour singles main draw match ever in his hometown, he lost to fifth seed Yannick Hanfmann in two close sets.
Just a week after his first appearance in the ATP circuit, he won his first ITF title in Glasgow. And a week later, he remained unbeatable, he won his second title in Sunderland. Partly due to his first qualification for an ATP tournament and winning two ITF titles, he entered the top 500 for the first time in his career on 6 November 2023.
2024: Maiden Challenger title, top 250
Blockx received a wildcard for the qualifying competition at the 2024 Australian Open. He also received a qualifying wildcard for the 2024 Miami Open but lost to Pedro Martinez in the first round. He reached a new career high ranking in the top 300 of No. 294 on 18 March 2024.In November, Blockx won his maiden Challenger title in Kobe, Japan defeating Jurij Rodionov in the final. He became the third youngest Belgian champion in Challenger history. En route to the title, he defeated for the first time a top 100 and home player Taro Daniel. As a result, he rose to No. 205 on 18 November 2024, which gave him a direct entry to the Grand Slam qualifying rounds.
2025" First win, top 110
In January, Blockx won his second Challenger title in Oeiras, Portugal defeating Liam Draxl in the final. He became the youngest Belgian to earn multiple trophies at that level. As a result, he entered the top 150 in the singles rankings on 27 January 2025.Blockx made his Masters main draw debut at the 2025 Miami Open as a qualifier but lost to Corentin Moutet.
In July, Blockx reached his third Challenger final at the Winnipeg Challenger, losing to Liam Draxl in the final.
Blockx entered his second Masters 1000 main draw as a qualifier at the National Bank Open in Toronto. Ranked at a career-high of world No. 119, achieved on 4 August 2025, Blockx also qualified for the main draw at the Cincinnati Open, where he recorded his first ATP Tour win by defeating Marcos Giron. The result solidified Blockx fifth position in the NextGen Live Race to Jeddah. Blockx won his second Challenger of the 2025 season at the 2025 Slovak Open, and moved to fourth in the NextGen race. At the 2025 Moselle Open, Blockx received an entry through the Next Gen Accelerator programme and recorded his second tour-level win, defeating qualifier Francesco Passaro. As a result he moved up to world No. 101 in the singles rankings on 10 November 2025,
2026: Masters debut, top 100
In January, Blockx won the title at the Canberra Challenger 125. He entered the top 100 as a resultBlockx made his major debut at the Australian Open as a lucky loser, following the withdrawal of Arthur Cazaux. He lost in the first round to Jaime Faria in four sets.
Personal life
Blockx' parents were both professional athletes: His father, Oleg, was a track athlete in hurdle races and his mother, Natalia, was a swimmer.Since 2022, Blockx partly trains at the in Antwerp and Cassiers' Forest Hills Tennis Academy.
Performance timeline
Singles
ATP Next Generation finals
Singles: 1 (runner-up)
ATP Challenger Tour finals
Singles: 5 (4 titles, 1 runner-up)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score | ||||||||||||||||||||||||||||||||||||||||||||||
| Win | 1–0 | 2024 Kobe Challenger – Singles| | Kobe Challenger, Japan | Challenger | Hard |  dts|Jan 2025Doubles: 1 (runner-up)
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dts|Sep 2023