Stefanos Tsitsipas saved the first nine break points he faced against Roger Federer on Saturday afternoon en route to beating the Swiss by two sets to love (6-3, 6,4) at the Nitto ATP Finals semi-final.
In an inter-generational clash, Tsitsipas, 21, overshadowed Federer, 38, at London’s O2 Arena and advanced to the the final in his tournament debut.
Stefanos Tsitsipas had warned Roger Federer that he feels fresher despite losing his match with Rafael Nadal on Friday three sets after two hours and 52 minutes of action.
“My body feels well currently. I don’t feel pain anywhere. I feel fresh, honestly,” he said.
“After having a long, difficult match like this, I feel like I can go out and play tomorrow the same way. So I don’t have any problem with that.”