Nick Kyrgios stepped off court to smash two racquets and toss his shoes to spectators in a meltdown during a second-round ATP Cincinnati Masters loss to Russia's Karen Khachanov.
Eighth-seeded Khachanov rallied for a 6-7 (3/7), 7-6 (7/4) 6-2 victory over the volatile Australian, but the final set was close to farce, with Kyrgios engaged in a running dialogue with Irish chair umpire Fergus Murphy.
"He has a really great talent but sometimes the head not in the right place," Khachanov said on Wednesday.
"It was a really difficult match for me -- I had to really work it out, how to get the win.
"It's really tough (playing Kyrgios), not only for me but for everybody. You have to try and handle it, then you can have chances to win the match. Always try to stay in there."