Medvedev out, Novak into ATP Finals semis

Novak Djokovic has booked his place in the last four of the ATP Finals with a crushing 6-4 6-1 defeat of Andrey Rublev at the Turin showpiece.

After the first nine games went with serve, Djokovic switched on the after-burners to outclass Rublev on Wednesday.

In the late Red Group clash, Stefanos Tsitsipas triumphed 6-3 6-7 (11-13) 7-6 (7-1) in a two hour 21-minute battle over Daniil Medvedev in one of the matches of the season.

Tsitsipas kept on track to become the 11th player to win multiple ATP Finals titles after triumphing on debut at the prestigious year-end event in 2019, defeating Dominic Thiem in the decider.

In the 11th chapter of their longstanding rivalry, it was Tsitsipas who prevailed in a thrilling topsy-turvy clash that swayed one way and then the other at the Pala Alpitour.

The 24-year-old squandered three match points in the second set, before he regained his focus, rallying from 3-5 in the third set to eventually improve to 4-7 in his head-to-head series against Medvedev.

"It was very tiring out there," Tsitsipas said after his Tour-leading 61st victory of the season.

"I'm so glad I overcame this and I was able to enjoy it with the crowd. It's a great win and I'm extremely proud of the way I fought.

"It was great to get back into the match, I felt reborn, and what a great way to end it."

The second-seed will face another Russian in Rublev on Friday in a winner-takes-all clash, with a spot in the semi-finals at stake as both players are now at 1-1.

Rublev, who like Djokovic had won his opening match at the year-ender, capitulated when serving to stay in the opener, losing the set as Djokovic thumped a backhand return winner.

The second set was a non-event as the five-time champion roared to victory in little more than an hour.

"I played one of my best matches of the year," Djokovic, who was watched for the first time by both his children Stefan and Tara," said on court.

"I found the right attitude and the right game and once I won the first set his energy went down.

"In the second set I just wanted to use that momentum and it was a flawless second set."

Despite being guaranteed a place in the weekend's semis when Djokovic will hope to equal Roger Federer's record at the ATP's season-ender with a sixth title, the 35-year-old Serb said he will not be relaxing against Medvedev.

"It won't just be a stroll in the park," he said.

"Knowing I'm in the semis it's a great boost but at the same time I want to focus on every match."

If 21-time grand slam champion Djokovic wins the title this week he will be the oldest player ever to achieve the feat.