MELBOURNE, Jan. 14 (Xinhua) -- Melbourne Park was hit by excessive heat as the temperature reached a high of 41.8 degrees Celcius at 5 p.m. but Tuesday is still a cold day for Aussie fans and players at the Australian Open.
Bernard Tomic retired injury after losing the first set 4-6 and gave top seed Rafeal Nadal an easy win to advance into the second round.
Tomic left the court for a medical time-out for several minutes after the third game and decided to retire with an apparent left thigh injury after the first set.
Tomic's compatriot and former world No. 1 Lleyton went down to Italian No. 24 seed Andreas Seppi in a draining 4 hours and 18 minutes matchup.
The 32-year-old trailed by two sets to love and a break in the third before making his way into a fifth but still departed the Australian Open at the first-round stage for the second successive year.
Wildcard James Duckworth's loss was not quite a surprise as the Aussie lost to four-time champion Roger Federer in straight sets. The Swiss used only 1 hour and 46 minutes to begin his 57th consecutive major tournaments, surpassing the Open Era record of 56 he used to share with Wayne Ferreira of South Africa.
The 17-time Grand Slam champion will play against Blaz Kavcic, who qualified as opponent Radek Stepanek retired of injury.
Three-time runner-up Andy Murray beat Japan's Soeda Go 6-1, 6-1 and 6-3 to make his return to Grand Slam action for the first time since his back surgery in September.
The fourth-seeded Scot won the 2013 Wimbledon Open to become the first British winner in 77 years but had surgery in September and missed the rest of last season. He said his back felt fully recovered, but added that the long lay-off meant the rest of his body was not yet at the level he would like.
All three Chinese players played on Tuesday failed to make into the second round. Qualifier Zhang Ze lost to 31st seed Fernando Verdasco. Peng Shuai was defeated by Japanese Nara Kurumi while Duan Yingying lost to Belarussian Olga Govorlsova.
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Tomic retired from match against Nadal due to injury
Andy Murray beats Go Soeda 3-0 at Australian Open
Federer wins men's singles 1st round of Australian Open