Rafael Nadal suffers straight sets defeat to Taylor Fritz in opening match of the ATP Finals

Rafael Nadal’s chances of finishing the year ranked world No 1 suffered a major blow with a straight-sets loss to debutant Taylor Fritz in his opening match at the ATP Finals in Turin.

Nadal began the event 1,000 points behind his fellow Spaniard Carlos Alcaraz, who is missing the tournament through injury, but now will have to win the title to overtake him.

His more immediate aim will be to raise his level in his second group match against Felix Auger-Aliassime after an error-strewn performance in a 7-6 (3) 6-1 loss to American Fritz.

The first set was high quality but Nadal, who also lost his opening match at the Paris Masters last week and has not tasted victory since the third round of the US Open more than two months ago, faded badly in the second.

It was a fine performance from Fritz, though, with the 25-year-old claiming a second victory of the season over Nadal after also beating him in the final in Indian Wells in the spring.

Nadal, who has been spending time at home with his new-born son, said: “I don’t think I was getting in the right positions in the first set. I think that my serve worked well, then he was hitting the ball very strong.

“I need more matches to play at this kind of level, even if I am practising well, much better than how I am competing, without a doubt. That’s normal.

“It’s not the ideal tournament and probably part of the season to come back after a couple of months without being on the tour because you don’t have time to get confidence.

“In this tournament I still have a chance. But of course I’m not happy about the beginning. That first match was very important for me.”

He will next face third seed Casper Ruud, who played his best match since losing his second grand slam final of the year in New York to beat Auger-Aliassime 7-6 (4) 6-4.