It didn't stop him from entertaining his fans, though. He played a shot between his legs, with his back to the net, to set up a breakpoint chance in the fourth game of the third set which brought the crowd to its feet.
On the women's side, second-ranked Petra Kvitova and No 4 Maria Sharapova advanced with lopsided wins.
After surrendering her opening service game with a double-fault, Wimbledon champion Kvitova won 12 consecutive games in a 6-2, 6-0 win over Russia's Vera Dushevina.
Last week, Kvitova missed a chance to overhaul Caroline Wozniacki's No 1 ranking when she lost in the Sydney International semifinals. She needed to win the Sydney tournament to take the top ranking.
But she gets another chance at Melbourne Park, where she is one of six women who can finish No 1.
Sharapova, a former Australian Open and Wimbledon champion, won the first eight games of a 6-0, 6-1 win over Gisela Dulko of Argentina in her first match since returning from a left ankle injury.
US Open champion Sam Stosur crashed out in straight sets in a major blow for local fans desperate to end a long drought at the national championship.
Sixth-seeded Stosur lost 7-6 (2), 6-3 to No 59-ranked Sorana Cirstea of Romania to continue her terrible run at home since beating Serena Williams to capture her first Grand Slam title in New York last September.
Other women advancing included No 27 Maria Kirilenko, who beat Australian hope Jarmila Gajdosova 6-4, 6-2, Canada's Aleksandra Wozniak, Shahar Peer of Israel and 2000 Wimbledon semifinalist Jelena Dokic.
Auckland men's open winner and No 5 seed David Ferrer advanced in straight sets, 6-1, 6-4, 6-2 over Rui Machado of Portugal.
- AAP