Former World No 1 Roger Federer and Great Britain's Andy Murray have progressed to the second round of the 2013 Australian Open on day two.
Four times Australian Open winner Federer defeated French international Benoit Paire in straight sets, 6-2, 6-4, 6-1. Murray also won his first round match in straight sets beating Robin Haase at the Rod Laver Arena, to set up a second round clash with Portuguese Joao Sousa.
"I'm very revved up. That's not the issue. I didn't at any stage say that I was 'very relaxed.' But I didn't work hard in Miami in the off season to come in and just not be focused or too relaxed or anything like that. I didn't train over there for four weeks to come here and put in a really bad performance. I plan on playing well here," Murray said.
France's Jo-Wilfried Tsonga moved into the second round after defeating his compatriot Michael Llodra in straight sets. The 2008 Australian Open finalist is seeded against Japanese Go Soeda for the next round match.
Men's seventh seed Juan Martin Del Potro has progressed to the second round after defeating Adrian Mannarino in straight sets at Hisense Arena while 12th seed Marin Cilic won his first game of the tournament, overcoming Australian Marinko Matosevic.
There were also wins for Milos Raonic (13), Thomaz Bellucci (29), Marcel Granollers (30) and Philipp Kohlschreiber (17), among others. However, Britain's Jamie Baker did not progress to the next round as he lost his first match in straight sets to Lukas Rosol.
Defending women's champion and World No 1 Victoria Azarenka did not have any trouble in qualifying for the second round, winning in straight sets against Monica Niculescu, to set up her next round match against Eleni Daniilidou.
Serena Williams had a scare during her first round match against Edina Gallovits-Hall at Hisense Arena, when she twisted her right ankle when running wide during the first set. However, the American was back after a few minutes, winning the game 6-0, 6-0 as the tie ended in less than an hour.
"I think I was really, really close to panicking because a very similar thing happened to me last year, almost on the same side, the same shot. So I almost panicked, and I thought, I can't do that. I just have to really remain calm and think things through. At that point I think I really started to focused. For me, when I was injured, I just thought, 'Just relax. Have nothing to lose at that point, so I just started swinging freely," Serena said.
Britain's Laura Robson also won her first game after beating Melanie Oudin in straight sets, 6-2, 6-3. There was some drama at the Margaret Court Arena when seventh seed Sara Errani lost the opening game in straight sets to Carla Suarez Navarro.
There were also wins for Caroline Wozniacki (10), Petra Kvitova (8), Maria Kirilenko (14), Nadia Petrova (12) and Lucie Safarova (17), among others.