Alexander Blockx is a Belgian professional tennis player who broke through to the top of the game with a run to the Madrid Open 2026 semi-finals as a qualifier — winning five matches in a row, including a quarter-final victory over defending champion Casper Ruud and a first career win over a top-10 opponent. Born in Antwerp on 8 April 2005, Blockx had spent years on the Challenger circuit and reached the Next Gen ATP Finals before that Madrid breakthrough lifted him to a career-high ranking and into the top 40 for the first time.

Player Profile

Detail	Info
Full name	Alexander Blockx
Date of birth	8 April 2005
Nationality	Belgian (born in Antwerp)
Height	193 cm / 6 ft 4 in
Plays	Right-handed
Turned pro	2022
Highest ranking	World No. 36
Grand Slam titles	None

Current World Ranking & Recent Form

Blockx reached a career-high ranking of world No. 36 in May 2026 on the back of his run to the Madrid Open semi-finals. Entering Madrid as a qualifier — meaning he won matches before the main draw even began — he beat Félix Auger-Aliassime 7-6(3), 6-3 for his first top-10 win, then Francisco Cerúndolo 7-6(8), 6-2, and then defending champion Casper Ruud 6-4, 6-4 to reach his first Masters 1000 semi-final, before losing to Alexander Zverev in the last four.

Selected recent results:

Tournament	Result	Notable
Madrid Open (Masters 1000) 2026	Semi-final	As a qualifier; beat Auger-Aliassime, Cerúndolo and defending champion Ruud
Next Gen ATP Finals 2025	Runner-up	Lost the final to Learner Tien

Playing Style & Strengths

At 6 ft 4 in, Blockx is a physically imposing player whose game is built around his size and athletic foundation. He is a right-hander who uses his serve as a platform to build points, with heavy groundstrokes from both wings. What became evident during his Madrid run was his ability to maintain a high level across multiple rounds, beating a different quality of opponent each time and adjusting his approach accordingly — a tactical intelligence beyond what his tour experience would suggest.

His clay game is newer than his hard-court game, but his physical attributes translate naturally to the slower surface, and Madrid demonstrated that the clay game was there once his confidence on the surface arrived. He had said before that run that he never had much confidence on clay; his results since have changed that assessment.

Career Highlights

Blockx has been a consistent presence on the Challenger circuit since turning professional in 2022, winning four Challenger titles (Kobe 2024, plus Oeiras, Bratislava and Canberra). In 2025 he reached the final of the Next Gen ATP Finals, losing to Learner Tien — a strong indicator of his ceiling among the generation below the top 30. His Madrid 2026 semi-final lifted him into the top 40 for the first time and stands as comfortably his best result at tour level. He has made Grand Slam main-draw appearances but has yet to make a deep run at a major.

Stat	Detail
Grand Slam titles	None
ATP Tour titles	None yet (4 Challenger titles)
Best Masters 1000 result	Semi-final (Madrid 2026)
Next Gen ATP Finals	Runner-up (2025)
Highest ranking	World No. 36
Notable wins	Auger-Aliassime, Ruud (defending champion), Cerúndolo — all at Madrid 2026

Tournament Schedule

As a top-40 player, Blockx contests the Grand Slams and the ATP Masters 1000 and ATP 500/250 calendar. His hard-court game is his most established, but his Madrid run showed his physical style suits slow clay too. For his current entry list, draw, next opponent and how to watch, see the ATP Tour hub.

Alexander Blockx Betting Tips & Predictions

Blockx is a credible value pick in outright markets at tour level, particularly now that Madrid confirmed he can beat top-10 players across multiple rounds. His physical, baseline-heavy game makes him difficult to dismiss on slower surfaces, and his hard-court experience is his deepest. He is best backed at longer prices in Masters and ATP 500 events rather than as a short-priced favourite. Follow our tennis betting tips for the latest Blockx predictions.

View Blockx’s latest odds at Bet365

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FAQs

How old is Alexander Blockx?

Alexander Blockx was born on 8 April 2005, making him 21 years old.

What is Alexander Blockx’s ATP ranking?

Blockx reached a career-high of world No. 36 in 2026 after his Madrid Open semi-final run. Check our live ATP rankings page for his current position.

What nationality is Alexander Blockx?

Blockx is Belgian, born in Antwerp, and represents Belgium on tour.

Has Alexander Blockx won an ATP title?

Not yet. He has won four ATP Challenger titles and reached the Next Gen ATP Finals final in 2025. His Madrid semi-final run in 2026 is his best result at tour level and makes him a leading contender for a maiden ATP title.

What did Alexander Blockx achieve at the Madrid Open 2026?

Blockx entered as a qualifier and reached the semi-finals, winning five matches in a row. He beat Félix Auger-Aliassime for his first top-10 win, then Francisco Cerúndolo, and defending champion Casper Ruud 6-4, 6-4 in the quarter-finals, before losing to Alexander Zverev in the last four.

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