Italy's Jannik Sinner began his bid to retain the ATP Finals title with a resounding 7-5 6-1 win over injury-hit Canadian Felix Auger-Aliassime in their round-robin clash at a packed Inalpi Arena on Monday, Reuters reported.

The pair were meeting for the fourth time since August, and eight days after their last clash, with the outcome the same as Sinner eased into the match before overpowering Auger-Aliassime, who needed medical attention during the second set.

Sinner extended his incredible indoor hardcourt winning streak to 27 matches, his last defeat on the surface coming against Novak Djokovic in the 2023 ATP Finals decider, according to Reuters.