He's performed underarm serves, mimicked Cristiano Ronaldo's 'siuuuu' celebration, and swigged beer on court to celebrate a win - and now it seems Nick Kyrgios has prompted opponents at the Australian Open to challenge him to a fight.
Kyrgios has been his usual exuberant self in Melbourne, and enjoyed the support of a partisan home crowd when he and partner Thanasi Kokkinakis faced no 1 seeds Nikola Mektic and Mate Pavic in the Kia Arena.
With the 26-year-old already out of the singles having lost to Daniil Medvedev, there was increased scrutiny on his second-round match with compatriot Kokkinakis - and sure enough, the pair delivered by beating the Wimbledon and Olympic champions 7-6 6-3.
