Alcaraz won the Beijing title in October but his form since winning Wimbledon earlier this year has been unconvincing, suffering a second-round exit at the U.S. Open and being beaten by Ugo Humbert in the round of 16 at the Paris Masters.

In the Nitto ATP Finals Round Robin on Wednesday, No. 3 Carlos Alcaraz takes on No. 8 Andrey Rublev in a clash featuring two of the top 10 players in the world rankings. Watch tennis, other live sports and more on Fubo.

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