John McEnroe Backs Jakub Mensik to Trouble Alexander Zverev in French Open Semi-Final

Jakub Mensik’s route to a first Grand Slam semi-final was supposed to be the sideshow. The anticipated quarter-final clash between Joao Fonseca and Alexander Zverev captured most of the pre-match attention at Roland Garros, but the Czech teenager had other ideas — and John McEnroe believes he can go even further.

Speaking on TNT Sports and HBO Max, the seven-time Grand Slam champion offered a pointed assessment of Mensik’s 6-4, 6-3, 7-6(3) dismissal of Fonseca, suggesting the result exposed limitations in the Brazilian’s current Grand Slam readiness while simultaneously elevating Mensik’s status as a legitimate final contender.

“I’ll tell you, he’s gonna be a handful for the next 10 years,” McEnroe said of Mensik. “I didn’t know how quick he was at that height. You know, and you don’t know how these young kids can recover, and that was unknown. It looked like he ended up being the fresher. The two guys, certainly, by the end, especially, even though he was sort of by hip hurts or something, I think that was more nerves than anything else. But the way he got up to those drop shots. He was just so skilful with that feel.”

McEnroe also drew a direct tactical comparison between Mensik and his Friday opponent, identifying a potential vulnerability in Zverev’s movement. “Zverev to me at 6’6″, he moves side to side — awesome. But he’s not quite as good moving forward as Mensik. He moves forward so well and he’s a big guy 6’5″, so. Wow. That was impressive. If Mensik plays like that in the semi-finals, he’s going to give Zverev a lot of trouble.”

Zverev does hold an advantage in head-to-head terms, having defeated Mensik at the Rome Masters last month. However, that match required the German to work hard against a player who has grown considerably in stature and confidence since then. Zverev, the world number two, is also chasing a maiden Grand Slam title at a tournament where he reached the final in 2024, making the stakes particularly high for both players.

For Mensik, the semi-final represents uncharted territory. The 19-year-old was visibly emotional when addressing the Roland Garros crowd after securing his place in the last four — a run that included a notable victory over Novak Djokovic earlier in the tournament.

“Joao is a great guy and a great competitor. Before the match, I knew it would be a tough one,” Mensik said in his on-court interview. “We started a little nervous. At the end of the match, there were some incredible shots and I am super happy I was the one who came back. I managed to stay focused and keep fighting until the end.”

Mensik also reflected on the mental challenge of closing out the match, having held match points before eventually sealing the win in a third-set tiebreak. “It was really tough to stay focused until the end and I had match points. I am really happy that I managed to come back in the tie-break and move my game a little bit forward.”

Fonseca’s exit draws a line under what had been an encouraging Roland Garros campaign for the young Brazilian, who entered the tournament with significant expectations following a breakthrough year on tour. His defeat, however, underlines that the leap from promising prospect to Grand Slam semi-finalist remains a significant one.

For Zverev, McEnroe’s assessment adds external pressure to a match he would have entered as favourite. Whether Mensik can sustain the level he produced against Fonseca across five potential sets against a more experienced opponent will define whether Friday marks the beginning of a new chapter in his career.