Wimbledon 2025 has already been a rollercoaster of an event, and we are just two days in.

A mammoth 23 seeds have already been knocked out across the men’s and women’s sections, blowing wide open so many different sections of the draw.

And, with round two throwing up another set of mouth-watering matches, it is expected that even more could now fall over the next two days.

With that being said, we are still on for a few high-level collisions later on at Wimbledon, should certain players avoid an upset.

Jannik Sinner, though, has now been warned about one player he could face as early as the fourth round.

Jim Courier warns Jannik Sinner about top American player

Chatting on Tennis Channel Live after day two of Wimbledon action, Jim Courier made his prediction for who might actually be able to threaten the world number one at the All-England Club.

Unsurprisingly, he named a fellow American, but to suggest Tommy Paul is not an unpopular opinion given his history on this surface.

Internazionali BNL D'Italia 2025 - Day TwelvePhoto by Tullio Puglia/Getty Images

Courier admitted: ‘I certainly like Jannik’s chances, but Tommy Paul is one of those guys you’d be concerned about, I think, if you were in Jannik’s team.

‘Because he’s got that Swiss Army knife that he can bring to the fight, right? He can chip and charge, he can crush and rush, he can get to the net. He’s got finesse, and his serve, I think, Tommy Paul served games a lot on the surface because he’s very comfortable hitting the slider.’

Prakash Amritraj, his fellow pundit, then expanded: ‘A little bit more into the details of that, when he does get into the net, I think he’s one of those few players who has good net coverage, too. Frances, him, Carlos, of course, they move in the right direction. They’re able to actually cover based on the read of the passing shots. I think it’s a little bit of a lost art. He has that.

‘Again, one of those tools that I think very useful when you play those top couple guys.’

Jimmy Connors predicted which American would go the furthest at Wimbledon before the tournament, and so far that’s on track to come true.

Tommy Paul’s fitness going into Wimbledon is a concern

The only thing that might worry Paul’s chances of beating Sinner, or even getting that far at Wimbledon, is his fitness.

After all, the 28-year-old suffered an injury during his run at Roland Garros, which has frustratingly spilt over into the grass-court season.

Forced to miss Queen’s and thus give up his title without a fight, he then returned in Eastbourne only to be easily beaten by Dan Evans.

A routine first-round win against Johannus Monday has offered him a nice return to form and fitness, and now hopefully he can build on this ahead of his projected meeting with Sinner.