ATP Finals: Felix Auger-Aliassime defeats Ben Shelton, Jannik Sinner vs. Alexander Zverev

Auger-Aliassime soon found himself trailing 4-1 in the first set. Shelton made the most of his serve and volley, but he broke his opponent’s serve.

However, a poor service game ceded the initiative and the opener to fifth seed Shelton.

Shelton had the only break point of the second set, but an increasingly confident Auger-Aliassime saved it and then sealed the decider with a wild double fault from Shelton.

The third set was also won by Shelton’s serve, and Auger-Aliassime cashed in on his third match point.

“He was a lot better than me at the beginning,” Auger-Aliassime said.

“It’s been a weird start but as the game goes on I’m looking for ways to give back on the pitch.”