Carlos Alcaraz suffered a loss in his first match at the ATP Finals in Turin. World no. 3 fell to Casper Ruud 6-1, 7-5 in an hour and 25 minutes, wasting a massive advantage in the second set and extending his struggles on an indoor court.

Carlos Alcaraz struggled with a stomach issue and looked far from the player who won two Grand Slams this year in losing to Casper Ruud 6-1, 7-5 at the ATP F

Out-of-sorts Carlos Alcaraz shocked by Casper Ruud in John Newcombe Group; Alexander Zverev starts campaign with win over Andrey Rublev; watch all the action from the ATP Finals on Sky Sports Tennis and Sky Sports+ which is integrated into Sky TV,