Jannik Sinner reclaimed the No 1 ranking in men's tennis after beating Felix Auger-Aliassime 6-4, 7-6 (4) in the Paris Masters final on Sunday.

The four-time Grand Slam champion from Italy replaced six-time major winner Carlos Alcaraz at the top, as he extended his indoor winning streak to 26 matches, following up his victory in Vienna the previous Sunday with his first Paris title.

The ninth-seeded Auger-Aliassime needed to win the tournament at Paris La Defense Arena to clinch the eighth and final spot for the season-ending ATP Finals in Turin, Italy.

But Sinner did not concede a break point chance in the match, and won the tournament without dropping a set.

"It's huge, honestly. It was such an intense final here, and we both knew what was on the line," Sinner said. "For him, it's a very tough and difficult spot, but from my side, I'm extremely happy."

Sinner beat Auger-Aliassime for the third straight time — including in the semifinals at this year's US Open — and now leads the Canadian 3-2 head-to-head.