ATP Finals: Thiem edges Nadal, books semifinal spot

Dominic Thiem celebrates a point against Rafael Nadal. Photo: Reuters

London: Austria's Dominic Thiem produced a fearless display of attacking tennis to beat Rafael Nadal 7-6(7), 7-6(4) in a high-quality duel to book his place in the last four at the ATP Finals on Tuesday.

The world No. 3 struck 37 clean winners to claim his second round-robin victory and reigning champion Stefanos Tsitsipas's narrow defeat of Andrey Rublev later guaranteed the Austrian a semifinal spot with a match to spare.

"Definitely one of the better matches I have played so far in my career," this year's US Open champion Thiem said.

Crucially he saved a couple of set points in the first tie-break before whipping away a forehand to take an opening set in which there was barely a cigarette paper between the two.

Spaniard Nadal, bidding to win the only big title to elude him, engineered the first break of the match at 3-3 in the second set only for Thiem to reply in stunning fashion.

Nadal was on the brink of defeat when he slipped 0-40 behind serving at 4-5 after a wayward smash, but the 20-time Grand Slam champion dug himself out of a hole, saving three match points, one with a deft drop volley that clipped the tape.

Thiem was unshakeable, however, and played the sort of courageous tennis that has become his trademark as he forged his way into a 6-3 lead in the day's second tie-break.

Nadal clawed one point back, but Thiem finished it off when his opponent dragged a backhand wide, a rare unforced error in an absorbing contest sadly played out in an empty O2 Arena.

"It was very important to get that first set because the winning percentage he has after winning the first set is incredible," Thiem, who claimed a sixth win in 15 matches against Nadal, said. "It's almost impossible to beat him after losing the first set."

Nadal said "small details" decided a superb contest and remains confident he can still win the elusive title, although on Thursday he faces a shootout with Tsitsipas, who survived an ambush by Russian debutant Rublev to win 6-1, 4-6, 7-6(6).

"It's going to be another tough one but playing like this I am confident that I can have my chances in the tournament," Nadal, twice a runner-up in London, said.

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