Mensik Makes History: First Czech Semi-Finalist Since Lendl, Zverev Next

The quarter-final on Court Philippe-Chatrier on Tuesday evening, where two young men of tennis's future met, was perhaps more of a story titled "change of generations" than a classic. 20-year-old Jakub Mensik and 19-year-old Joao Fonseca were both among the most talked-about players of the tournament. Fonseca, after defeating Novak Djokovic in 5 sets in the fourth round and shaking the famous café, also passed Casper Ruud and became the first Brazilian male to play in the Paris quarter-final since Gustavo Kuerten in 2004. Mensik, after defeating Andrey Rublev in a 5-set marathon, became the youngest Czech since Ivan Lendl in 1980 to reach a Grand Slam quarter-final. As a result, two tired but passionate opponents came to the court on Tuesday evening.

The match lasted 2 hours 44 minutes. Mensik started with a 6-4 superiority in the first set; he expanded the gap in the second set with 6-3. In the third set, Fonseca went into resistance — the young Brazilian put all his energy to extend the match and carried the set to tiebreak. But Mensik won the tiebreak 7-3. The match-ending stroke was also striking: after an 8-shot backhand-to-backhand warfare, Mensik pulled out a backhand groundstroke winner to the forehand corner, Fonseca could not reach. Court Philippe-Chatrier stood up, Mensik knelt down.

In the anatomy of the match, Mensik's serve dominance is the key point. The Czech player hit 11 aces, Fonseca 6. But the main distinction was in points on first serve: Mensik 83% (54/65), Fonseca 61% (54/89). This shows that Fonseca, despite his high first serve accuracy (70%), could not protect it against his opponent. On the second serve, the picture reversed: Fonseca 58%, Mensik 33%. That is, Mensik managed the match with the power on his first serve; when he struggled on his second serve, he entered short rallies and tired his opponent, so the second serve weakness was not damaged. Double faults were equal (4-4).

Looking at the rally analysis, Mensik's total point superiority is +6: 117-111. Mensik is ahead in all rally distances — in 1-4 stroke rallies 59-56 (+3), in 5-8 stroke rallies 41-39 (+2), in 9+ stroke long rallies 17-16 (+1). The margin was small but Mensik being ahead in every category showed that the anatomy of the match progressed as "accumulation of small superiorities". He hit a total of 36 winners (11 aces included); the CourtVision map shows that Mensik piled his winners mostly to Fonseca's forehand side — the Brazilian player could not find his opponent with his wing.

Mensik's 2026 season breakout was striking. In the 2025 Miami Open final, he had defeated Novak Djokovic 7-6, 7-6 and taken his career's first Masters 1000 title — went down in history as one of the youngest players to beat Djokovic in a Masters final. Since then he has been in the Top 30; now he is in 27th place. He is seen as the new-generation star of Czech tennis; his serve (1.98m tall) is strong, his forehand is aggressive, his developing game understanding on clay draws attention. This is his career's first Grand Slam semi-final. Although four of his five tough matches at Roland Garros have extended to 5 sets, Mensik's physical resistance is still standing.

The story on Fonseca's side is bittersweet. The 19-year-old Brazilian player, who moved up to the ATP level in 2024, is shown as the new hope of Latin American tennis. Defeating Djokovic in the 4th round was one of the most talked-about surprises we have seen at Grand Slams. He also defeated Ruud in the quarter-final and represented Brazil at the Paris last eight since Kuerten. The legend Kuerten was sitting in the stands and Fonseca called him "an idol for our sport, for our country" in his on-court interview. However, Fonseca's physical resistance was not enough against Mensik — after the 5-set Djokovic and Ruud matches, mental and physical fatigue was felt in the quarter-final.

In the semi-final, Mensik's opponent will be 2 seed Alexander Zverev. The German player defeated 19-year-old Spanish young Rafael Jodar 7-6(3), 6-1, 6-3 in the quarter-final. Zverev is in his career's 4th Grand Slam semi-final — the 28-year-old German who has so far seen 3 GS finals but won none of them. 2026 Roland Garros is one of the strongest probabilities in Zverev's search for the first Grand Slam title. But ahead of him is Mensik. The two players had previously met twice: Zverev won 7-6, 6-3 in the 2024 Halle final; Mensik won 6-3, 6-3 in 2025 Munich. H2H 1-1. The semi-final will probably be played on Thursday or Friday. In the other semi-final, the winner of the Carlos Alcaraz or Stefanos Tsitsipas matchup will be.

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