Daniil Medvedev believes that on Sunday evening, his victory over Dominic Thiem in the final battle of the ATP Finals has shown that he can compete in the world top.

The 24-year-old Russian, who already dealt with Novak Djokovic and Rafael Nadal on the way to the final, was too strong for the Austrian in an exciting three-set.

"This was the hardest win of my life," said Medvedev after the final in London, where he triumphed 4-6, 7-6 (2) and 6-4 after nearly three hours.

"Dominic is a really tough tennis player to play against and I think he was at his best against me. At least that's how it felt during the match."

27-year-old Thiem won the first set 6-4 and seemed on his way to victory in the second company, but left three breakpoints unused.

In the tiebreak Medvedev won the longest and in the decisive third set, one break at 2-2 was enough for the Russian to decide the final in his favor.

"In the third set I realized that Dominic was tired. He ran a bit slower and missed a few balls", Medvedev noted.

"To tire him out in a three-set is a great achievement. Dominic may not have many Grand Slam titles, but he played as one of the best players in the history of the sport."

Daniil Medvedev won the ninth ATP title of his career.

(Photo: Pro Shots)

'I have to show this more often'

It was only the second time that Medvedev participated in the ATP Finals, after he stranded in the group stage with three losses last year.

This year it went much better for him.

The number four in the world won all his matches in the group stage without a set loss - including those against Djokovic - and settled with Nadal in the semi-finals.

"It's really great to beat the best players in the world here. This means a lot to me and it also shows what I can do. I just have to show it more often," said Medvedev, who was the first player once beat the top three of the placement list in the ATP Finals.

"If you look at the whole tournament, he was the best player," Thiem admitted frankly.

"Daniil did not lose a set in the group stage and after that was also too strong for the numbers two and three in the world. He certainly deserved this title."

Medvedev won the ninth ATP title of his career in London.

The three-time winner of a Masters tournament was only once in the final of a Grand Slam tournament in his career;

in the 2019 US Open final, Nadal was too strong in five sets.