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.

Who will progress to the semi-finals? Follow the action with Katy Murrells’s game-by-game report.   15:06 Second set: Zverev* 7-6, 5-4 Alcaraz (*denotes next server) From 30-15, Zverev has Alcaraz on a piece of string,

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.