London, 12 November 2024 (PA Media/dpa/MIA) - Carlos Alcaraz made a stuttering start to the ATP Finals in Turin as he suffered a shock first career defeat to world number seven Casper Ruud.

The two-time Wimbledon champion, who claimed the first of his four grand slam titles by beating Ruud in the 2022 US Open final, went in to the contest leading the head-to-head results 4-0.

But inspired Norwegian Ruud impressively claimed a milestone success in the opening match of the John Newcombe Group, winning 6-1, 7-5 in an hour and 25 minutes.

"It's only one match but it's definitely one of the best wins of the season for me in terms of who I'm playing, his level, his ranking,'' Ruud said in an on-court interview.

"I feel very happy, of course. I think we will see Carlos play better tennis than he did today but I took care of my chances and it was a great win for me - hopefully I can build on it."

Out-of-sorts Alcaraz twice failed to hold serve in the opening six games, while he was unable to capitalise on five break points as he surrendered the first set in 36 minutes.

The 21-year-old Spaniard initially appeared to have restored order during a strong start to set two.

But he then blew a 5-2 lead, losing five games in a row for the second successive set before swiftly departing court following his surprise loss.

"I knew he was maybe dealing with a bit of a cold,'' 25-year-old Ruud said of world number three Alcaraz.

"I've seen him snuffling around in the area here and always with a tissue for his nose.

"Of course, that's sad, that's not good for him, but it's also part of the game and I knew it coming in.

"I tried to make him play rallies and do my best but it's not easy because, when you know someone is not a hundred per cent, maybe you get stressed yourself, thinking this is a really big chance for me to maybe win.

"I just tried to stay in my world, in the moment. Luckily I got a good start and the second set I was able to turn it around with some good tennis at the end."

Alexander Zverev chalked up a sixth straight win with a rapid 6-4, 6-4 victory over Andrey Rublev in the other contest in John Newcombe Group.

Zverev, fresh from replacing Alcaraz as world number two, triumphed in just 72 minutes and sent down nine aces a week on from his Paris Masters win.

It earned Zverev a Tour-leading 67th win of the season and ensured he made the perfect start to his pursuit of a third ATP Finals victory after success at the 2018 and 2021 editions.

Photo: EPA