Novak Djokovic slides to hit a backhand during the US Open final on Sunday.

Novak Djokovic fires a backhand during the US Open final on Sunday.

Novak Djokovic and Daniil Medvedev hug after the Russian defeats the World No. 1 to win his first major title at the US Open.

Daniil Medvedev and Novak Djokovic embrace at the net ahead of the US Open final.

Novak Djokovic falls to Daniil Medvedev in the US Open final in his only Grand Slam defeat of 2021.

Novak Djokovic celebrates a five-set win against Alexander Zverev on Friday evening in the US Open semi-finals.

Novak Djokovic improves to an unbeaten 12-0 in US Open quarter-finals after defeating Matteo Berrettini on Wednesday night.

Novak Djokovic recovers from a set down to defeat American Jenson Brooksby and set a US Open quarter-final clash with Matteo Berrettini.

Novak Djokovic has dropped the first set eight times in 25 Grand Slam matches this year... and rallied to win them all.

Novak Djokovic takes on American wild card Jenson Brooksby for the first time in the fourth round of the US Open on Monday night.

Top seed Novak Djokovic now leads Kei Nishikori 18-2 in their ATP Head2Head Series.

Novak Djokovic defeats Holger Vitus Nodskov Rune in four sets on Tuesday evening to reach the second round of the US Open.

Dusan Lajovic lifts the trophy alongside team captain Nenad Zimonjic (left) and teammates Novak Djokovic (right) and Nikola Cacic (far right) after Serbia's victory over Spain in the ATP Cup 2020 final in Sydney.

Novak Djokovic and Nina Stojanovic defeat Kevin Krawietz and Laura Siegemund on Thursday in Tokyo.

Top seed Novak Djokovic reaches the semi-finals on Thursday in Tokyo.

Nina Stojanovic and Novak Djokovic defeat Marcelo Melo and Luisa Stefani on Wednesday in Tokyo.

Novak Djokovic defeats German Jan-Lennard Struff to reach the third round on Monday in Tokyo.

Novak Djokovic defeats Hugo Dellien on Saturday to reach the second round in Tokyo.

Serbia's Novak Djokovic, winner of three Grand Slam titles this year, prepares for the Tokyo Olympics.

Goran Ivanisevic and Novak Djokovic celebrate the Serbian's sixth Wimbledon title.

Novak Djokovic celebrates after winning his sixth Wimbledon title.

Novak Djokovic thanks a young fan for her support by giving her a racquet after beating Matteo Berrettini in the Wimbledon final.

Novak Djokovic claims a record-equalling 20th Grand Slam title on Sunday at Wimbledon.

Novak Djokovic rallies from a set down to defeat Matteo Berrettini in four sets on Sunday in the Wimbledon final.

Novak Djokovic bounces back from losing the first set to Matteo Berrettini in the Wimbledon final on Sunday.