2003 Australian Open – Men's singles
Andre Agassi defeated Rainer Schüttler in the final, 6–2, 6–2, 6–1 to win the men's singles tennis title at the 2003 Australian Open. It was his fourth Australian Open title and his eighth and last major title overall. With the win, Agassi claimed his 21st consecutive match win at the Australian Open, as he won the title in 2000 and 2001 (he did not play in the 2002 event due to injury).
| Men's singles | |
|---|---|
| 2003 Australian Open | |
| Champion | Andre Agassi |
| Runner-up | Rainer Schüttler |
| Score | 6–2, 6–2, 6–1 |
| Draw | 128 |
| Seeds | 32 |
Thomas Johansson was the reigning champion, but did not participate due to injury.
Tim Henman and Greg Rusedski's withdrawals from the tournament marked the first time there were no British players competing in the Australian Open in the Open Era.
This event marked the first main-draw major appearance for David Ferrer, who lost to Lee Hyung-taik in the first round; it was also the final major appearance for former world No. 4 Richard Krajicek.