The 35-year-old Australian, currently of Melbourne Heart, spent the majority of his career in England, amassing almost 400 appearances.
Below, Sports Mole has picked out five of the best goals that he has scored for club and country.
1. Arsenal vs. Leeds, 2003
2. Liverpool vs. Everton, 2006
3. Liverpool vs. Levski Sofia, 2004
4. Australia vs. India, 2011
5. Galatasaray vs. Bordeaux, 2009