A timeline of Nick Kyrgios' and Stefanos Tsitsipas' turbulent relationship, from being double partners to playing one of the most ill-tempered Wimbledon matches ever.

Ahead of the 2018 US Open, Kyrgios appeared to poke fun at Tsitsipas on social media after he had posted about his experiences in New York.

"It's amazing how many sounds you can hear while walking in NYC," wrote the Greek on Twitter. "Just close your eyes and absorb."

Kyrgios retweeted the post alongside and wrote "Da fuq" – slang for, "What the fuck."

Tsitsipas did not take kindly to the comment, firing back by criticizing Kyrgios' very public love of video games.

"It's not sitting in my room playing video games, Fortnite like someone does," he said. "It's better going outside and creating something rather than just sitting inside playing video games for the whole day, which I did before and now see no point in doing."

At the Citi Open in Washington in July 2019, Kyrgios and Tsitsipas teamed up to play in the men's doubles.

The partnership came about after Kyrgios had said in a podcast he would like to play alongside the Greek.

It didn't last long, however, as the pair were knocked out in the first round within 66 minutes.

Tempers flared during the match last week after Tsitsipas received a warning for smashing a ball into the crowd, allegedly hitting a spectator, prompting Kyrgios to berate the chair umpire for not defaulting the Greek.

Frustrated with Kyrgios' moaning, which also earned him a warning, Tsitsipas then aimed a number of shots at the Australian and another into the stadium scoreboard.

Kyrgios eventually won the match 6-7 (2-7), 6-4, 6-3, 7-6 (9-7).

"He has a very evil side to him," Tsitsipas said of Kyrgios. "It's constant bullying, that's what he does. He bullies the opponents. He was probably a bully at school himself."

Kyrgios responded by calling Tsitsipas "soft" and accused him of being a sore loser.