John McEnroe has warned that Stefanos Tsitsipas will win a Grand Slam title soon, adding that he can 'do anything.'
Tsistipas has already reached two Grand Slam semi-finals despite being just 22-years-old, the latest of which being this year's Roland Garros.
The Greek star was superb in his quarterfinal against Andrey Rublev on Wednesday - the man who beat him in the final of Hamburg last month - and McEnroe thinks he could be the next ATP player to make a Grand Slam breakthrough.
"You have got to love the way Stefanos Tsitsipas plays, he can do anything," McEnroe told Eurosport.
"Both these players took a risk by playing the finals in Hamburg – the first day of the French Open – both players were down two sets to love in the first round.
"Rublev was lucky to get out of that, and the effort he put in just caught up with him. Rublev is usually a battler, so that’s the part that disappoints me.
"We’ve been waiting for bigger and better things from Tsitsipas since he beat Federer in Australia so he’s going to win a Major real soon.
If he is going to reach a first Grand Slam final this week in Paris then he will have to go through world number one in the semis, but McEnroe thinks it's possible.
"He is a big guy, he moves pretty well and he can attack better [than Pablo Carreno Busta, who Djokovic beat in the quarterfinals]
"So he has got to take it to Djokovic, not have the court taken from him and move forward when he has the chance – which is tough especially in these low, cold conditions."
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