- Venue: Melbourne Park
- Date: 16-29 January
- Time: 0000 GMT
Coverage: Watch live on Eurosport; singles finals and one men's semi-final on BBC Two/Red Button/HD channel/website; listen on BBC Radio 5 live; text commentaries and reports on the BBC Sport website
Djokovic is bidding to win his third title at Melbourne Park
Novak Djokovic started his Australian Open title defence with a crushing win against Paolo Lorenzi of Italy.
The top seed overturned an early break of serve and went on to win 6-2 6-0 6-0 in an hour and 32 minutes to seal a meeting with Santiago Giraldo.
Earlier, fifth seed
beat Rui Machado 6-1 6-4 6-2, and next plays America's Ryan Sweeting.
, Andy Roddick, Jo-Wilfried Tsonga and Lleyton Hewitt are also safely through.
"It was a great performance for my first official match of the 2012 season," said two-time champion Djokovic.
"It's great to come back to Melbourne; I have great memories here.
"Nowadays I'm a more complete player. I feel I know what to do on court.
"I'm physically stronger, move better, have improved my strokes and serve better - that gives me a lot of confidence."
, seeded 15, made easy work of Robin Haase in winning 6-3 6-4 6-1.
“I just tried to tried to put pressure on his second serve and managed to turn it around”
He will meet local favourite
, who claimed a 7-5 6-4 3-6 7-5 win over Cedrik-Marcel Stebe in round two.
Hewitt said: "I hung in there and kept making him play as he is one of the young guys on tour and he got a little tight serving for the set twice."
, the sixth seed, needed four sets to see off Denis Istomin, eventually winning 6-4 3-6 6-2 7-5, to set up a second round clash with Brazilian Richard Mello.
also made it safely through to round two with a 7-6 (7-5) 6-3 6-3 win over Australian wildcard Marinko Matosevic and will face Thomaz Bellucci in the second round.
, the number nine seed, beat Dmitry Tursunov 5-7 7-6 (14-12) 6-3 6-4, while Germany's
thrashed Lukas Rosol of the Czech Republic 6-0 6-0 6-2.
, seeded 17, overcame Andreas Seppi in four sets, while 24th seed
of Japan beat France's Stephane Robert 6-1 7-6 (9-7) 6-0.
Elsewhere, 26th seed
overcame a late fightback to sneak past Jesse Levine in five sets, while
Radek Stepanek, Juan Ignacio Chela
Alex Bogomolov Jr
, ranked 250th in the world, beat Jurgen Zopp 6-3 6-3 6-4 and has been rewarded with a second-round tie against Tipsarevic.