Roger Federer is very pleased with the way he took revenge on the ATP Finals on Novak Djokovic on Thursday evening. The 38-year-old Swiss, four months after his sensational defeat in the Wimbledon final, was too strong for the Serbian in two sets and thus joined the final four in the year-end tournament.

"I am playing very well this season and I think this victory proves that again," said a proud Federer after his great win (6-4 and 6-3) in London. "This was such a night when I had a clear game plan. It went exactly as I expected. The feeling at the end was great."

The twenty-time Grand Slam winner not only assured himself of a semi-final place in the Finals, but also took revenge for his defeat against Djokovic in the Wimbledon final. Federer forfeited two match points on his own service in the fifth set of that spectacle in July and perished.

"That final never really got through my mind, that's something journalists made up," said Federer, whose last win was at Djokovic in 2015. "I actually didn't know that I hadn't defeated him for years. Probably because we often did so little in comparison to each other."

"After Wimbledon, I felt that I would get my chance. It is always special to defeat Novak and certainly after what happened, but I did not feel that I had to deal with demons. I recovered fairly quickly of that defeat at Wimbledon. "

Roger Federer thanks the public after his victory. (Photo: Getty Images)

"Nice day for tennis"

It was already the 49th meeting between Federer and Djokovic and the 23rd time that the Swiss took the lead. His victory in London also means that Rafael Nadal will end the year as the number one in the world, because the eliminated Djokovic can no longer pass the Spaniard in the Finals.

"It was a good day for tennis," Federer said. "Not so much because I defeated Novak, but because the battle for number one position was palpable during the match and created a great atmosphere in the stadium. I also constantly reminded myself that I was less busy than Novak. I'm very content."

Due to his victory, Federer finished second in group Björn Borg and, together with Dominic Thiem, went to the semi-final. The other group - group André Agassi - consists of Stéfanos Tsitsipás, Rafael Nadal, Alexander Zverev and the already disabled Daniil Medvedev.

Nadal will compete against the Tsitsipás already placed at 3 p.m. and at 9 p.m. the encounter between Medvedev and Zverev, who won the ATP Finals last year by beating Djokovic in the final battle. Federer is the record holder with six titles.