TURIN, Italy — 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 Finals.

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.

Alexander Zverev faces Casper Ruud in a group stage match of the ATP World Tour Finals 2024. Here's everything you need to know to catch all the action, including when, where, and how to watch the live coverage.