Rafael Nadal advanced to the semifinals at the ATP Finals for the first time in five years and knocked out the defending champion in the process, defeating Stefanos Tsitsipas 6-4, 4-6, 6-2 Thursday at the O2 Arena.
It is the sixth time in 10 appearances that Nadal has reached the semifinals of the season-ending tournament, which is the biggest title he has yet to win in his illustrious career.
Tsitsipas won it on his first try last year but exited after a second loss of the group stage, done in by a shaky serve in the third set, during which he was broken three times.
Earlier, the already eliminated Andrey Rublev beat US Open champion Dominic Thiem 6-2, 7-5 in a contest that had little real consequence for either player. Thiem was assured of winning the group after defeating Tsitsipas and Nadal in the first two rounds.
Nadal never looked threatened on his serve versus Tsitsipas until the final game of the second set, when he double-faulted to hand the Greek player a way back into the match. “I think I was winning my serves quite comfortably until that moment,” Nadal said. “After that, everything changed.”
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Suddenly, neither player could hold serve as the third set started with three consecutive breaks, with Nadal taking a 2-1 lead. The Spaniard finally held and broke again for a 5-2 lead before clinching the victory on his second match point.
Nadal, who improved to 6-1 versus Tsitsipas, will play Daniil Medvedev in the semifinals on Saturday. Thiem will face the winner between Novak Djokovic and Alexander Zverev on Friday.
The early match between Thiem and Rublev was delayed after the lights went out unexpectedly at the O2 Arena.
Thiem was short of energy, too, when play eventually began.
“It was difficult to keep that amazing intensity like I had in the first two matches,” Thiem said. “I wanted to win the match, 100 percent, but the first two matches were pretty tough, pretty long.
“So with the fact I was already qualified, in the back on my mind it was difficult to keep the intensity alive.”
Rublev played like someone with nothing to lose, overwhelming Thiem with his serve and fierce groundstrokes to take the Austrian’s first two service games and clinch the first set in less than 26 minutes. He dropped only three points on serve and had no unforced errors in that set.
The second set was much closer, though Rublev was on top and serving at 4-3 when he lost eight consecutive points to get back on serve.
Rublev regrouped, broke Thiem after a long next game featuring some intense rallies, then served out the match for his first victory in his debut at the season-ending tournament.
“It was not easy for Dommy,” said Rublev, who has won five events on the tour this year in a breakthrough season. “I think he [was] focused on the semis. I wish him good luck — he deserves to be where he is and he deserves to win the title.”
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