Andy Murray has won his second match at Kooyong by beating Ivan Ljubicic 6-7 6-4 6-2.
The Scot said afterwards that he has never been in better shape for a Grand Slam.
I've never been more content before a slam. I feel good, I've trained hard and prepared well.
It was obviously hot but I didn't feel too bad actually. Your legs feel it, but I didn't feel too tired. I felt OK.
I've been doing a lot of training since I got here so it took a little while to get my legs moving.
In other newsThe 20-year-old, seeded ninth, will discover who his first-round opponent will be at the Australian Open on Friday.
Australian Open seedings1. Roger Federer (SUI)
2. Rafael Nadal (ESP)
3. Novak Djokovic (SRB)
4. Nikolay Davydenko (RUS)
5. David Ferrer (ESP)
6. Andy Roddick (USA)
7. Fernando Gonzalez (CHI)
8. Richard Gasquet (FRA)
9. Andy Murray (GBR)
10. David Nalbandian (ARG)
11. Tommy Robredo (ESP)
12. James Blake (USA)
13. Tomas Berdych (CZE)
14. Mikhail Youzhny (RUS)
15. Marcos Baghdatis (CYP)
16. Carlos Moya (ESP)
17. Ivan Ljubicic (CRO)
18. Juan Ignacio Chela (ARG)
19. Lleyton Hewitt (AUS)
20. Ivo Karlovic (CRO)
21. Juan Monaco (ARG)
22. Juan Carlos Ferrero (ESP)
23. Paul-Henri Mathieu (FRA)
24. Jarkko Nieminen (FIN)
25. Fernando Verdasco (ESP)
26. Stanislas Wawrinka (SUI)
27. Nicolas Almagro (ESP)
28. Gilles Simon (FRA)
29. Philipp Kohlschreiber (GER)
30. Radek Stepanek (CZE)
31. Igor Andreev (RUS)
32. Dmitry Tursunov (RUS)