Nick Kyrgios was knocked out of his home Grand Slam as he blew a two-set lead and a match point in losing to Andreas Seppi at the Australian Open.
Italy’s Seppi triumphed 1-6 6-7 (1-7) 6-4 6-2 10-8 in round two against the typically unpredictable Australian.
Kyrgios was given two warnings, for swearing and racquet abuse, before the 89th-ranked Seppi clinched victory.
Earlier, four-time winner Roger Federer held off the challenge of American prospect Noah Rubin.
The 35-year-old Swiss, who is seeded 17th after missing the second half of the 2016 season with a knee injury, saved two set points in the third to win 7-5 6-3 7-6 (7-3). Federer will play 2010 Wimbledon finalist Tomas Berdych in the third round.
Kyrgios impodes in five-set defeat
Kyrgios won a five-set scrap with Seppi on the same Hisense Arena court in 2015 to reach the quarter-finals but the roles were reversed here.
The 21-year-old Australian was in control before losing his temper as he complained of a knee injury midway through the third set.
Kyrgios, returning to tennis at the Australian Open after a ban for not trying at the Shanghai Masters ended his 2016 season, was given a warning for swearing and later docked a point for his second code violation after launching his racquet into the ground in frustration.
Seppi, 32, took the match into a deciding set and served for victory at 6-5 when Kyrgios played a between-the-legs shot on the first point before winning the game.
The Italian saved a match point at 7-8 and drew level again, broke in the following game when Kyrgios sent down a double fault, and then closed out the victory.
“Maybe it was meant to be,” Seppi said of avenging his 2015 loss. “I was concentrating on my game and not worrying about he was doing. It was important to keep going and to stay focused.”
Kyrgios admitted he needed to take his preparation more seriously. having “played too much basketball” in the pre-season.