Nick Kyrgios receives fight 'threats' after beating doubles No 1s – 'Thought it was UFC'

Former pro and Channel Nine commentator Sam Groth said: “Thanasi Kokkinakis messaged me as it was happening. He said: ‘I got accosted in the locker room by Pavic’s fitness trainer’.

“Obviously they weren’t very happy – they are the No.1 team in the world, the No.1 seeds. I guess going down to Thanasi and Nick. They didn’t accept what was going on with the crowd, what was happening with Nick.

“I think it is a little bit sof to take it off the court and into the locker room. And not even the players, from someone from the team, It is not necessary.”