Alexander Zverev became the first German to win the men's singles Olympic gold medal as he beat Karen Khachanov in straight sets at Tokyo 2020.

Zverev applied pressure from the start and rarely allowed Khachanov to settle, winning in just an hour and 19 minutes at the Ariake Tennis Park on Sunday.

The 24-year-old had beaten world number one Novak Djokovic to reach the final.

"This is so much bigger than everything else in sport," he said afterwards.

"You are not only playing for yourself, you are playing for your whole country - so this is an incredible feeling for me right now."

Silver medallist Khachanov, 25, said: "From beginning to the end, he played an unbelievable match."

Zverev is yet to win a Grand Slam, but he can now add Olympic gold to his list of 2021 achievements, which include the Mexican Open title and the ATP Masters 1000 crown.

Asked if this victory would give him confidence heading into the next major tournament, the world number five said: "I don't want to talk about the next Grand Slam because I have just won the Olympic Games - and there is nothing bigger than the Olympic Games.

"I want to enjoy this one for two minutes."

The German played nine matches in eight days in Tokyo, including his men's doubles fixtures along side Jan-Lennard Struff.

He said the heat was difficult to play in at times but, gesturing to the gold medal around his neck, added: "I think I coped well."

Doubles delight for Czech Republic

Czech Republic pair Barbora Krejcikova and Katerina Siniakova produced a superb performance to win women's doubles gold.

The top seeds beat Switzerland's Belinda Bencic and Viktorija Golubic 7-5 6-1.

The win denied Bencic a second gold of the Games after she won the women's singles title on Saturday.

They become the first Czech Olympic gold medallists in tennis as an independent nation since the split in 1993.

The French Open champions battled through a close first set, but then showed their dominance as a partnership in the second.

Krejcikova's former coach Jana Novotna, who died at the age of 49 in 2017, was the last Czech tennis medallist, having won bronze at Atlanta 1996.

The bronze medal had been decided on Saturday, with Brazilian pair Laura Pigossi and Luisa Stefani completing the podium.

An all-ROC mixed doubles final

The mixed doubles final went to a deciding tie-break set for the gold medal but it was Anastasia Pavlyuchenkova and Andrey Rublev who triumphed.

The number four seeds beat their compatriots from the Russian Olympic Committee, Elena Vesnina and Aslan Karatsev, 6-3 7-6 13-11.

The bronze was handed to the Australian pair of Ashleigh Barty and John Peers, after Serbia's Novak Djokovic pulled out of the match with a shoulder injury, which he acknowledged was "heartbreaking" for partner Nina Stojanovic.