Alexander Zverev admits he is very wary of the threat Jannik Sinner posts ahead of their fourth round clash at Roland Garros.
Sinner has been one of the stand-out stars of the tournament and is widely tipped for a big future in the game.
He also has recent history of beating top ten opposition after putting Stefanos Tsitsipas out of the Rome Masters last month, and Zverev is taking nothing for granted.
“[Sinner] is playing incredible," Zverev told reporters of the 19-year-old.
"He is somebody that is definitely coming up and playing really well right now, somebody who has a lot of power.
"We will see how the match goes, but I feel like I am playing better and maybe I have a little more experience.
"But the young guys, they have no fear, no reason to be nervous, so it can go both ways.”
Sinner, meanwhile, is not getting carried away with his fine performances in Paris so far, and admits he has a lot to learn about how to deal with Grand Slams.
“You have to think match after match," he said.
"I played a great first-round match against David, which gave me a little bit of confidence, for sure.
"But it's tough, it's not about winning in straight sets or winning in five sets.
“I have [to] improve even my performance after three sets, for sure.
"Like in the US Open I lost in five sets, so I still have to learn very much about playing Grand Slams.
"I played one Grand Slam at [last year's] US Open, [this year's] Australian Open. This is my third main draw. I'm still young, I can improve everything.”
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