Nick Kyrgios has sent a message to fans who booed him off court after retiring hurt at the Atlanta Open.
The Australian second seed was trailing British left-hander Cameron Norries 7-5 3-0 after 52 minutes of play on Saturday when he decided he could not continue.
He saw the trainer midway through the first set over his troublesome hip, but that did not prevent the crowd booing him off court at the conclusion.
The youngster has since taken to social media to apologise.
“Sorry Atlanta, Never the way I wanna go out, but gotta get my body right,” he wrote on Instagram on Sunday.
At times Kyrgios seemed disinterested in the contest, with his effort in question late in the opening set before he meekly double-faulted to give Norrie the early break in the second.
With the US Open just a month away, the World No.18 will have to overcome the recurrence of an issue that has plagued him since Queen’s last year.
Isner joins elite club with Atlanta Open victory
Meanwhile, John Isner has joined elite company by accounting for compatriot Ryan Harrison to win the Atlanta Open for the fifth time in the past six years.
The top seed Isner beat the eighth-seeded Harrison 5-7 6-3 6-4 at Atlantic Station – his second successive final win over his fellow American.
Isner, 33, became the fifth American man to win the same tournament at least five times after Jimmy Connors, John McEnroe, Pete Sampras and Andre Agassi.
“I’m very comfortable here,” Isner, the 6-foot-10 former University of Georgia star, said.
“I make breakfast in my own room, I go to the Publix next door, it really feels like I’m at home, and that helps so much.”