Every January, the best tennis players in the world descend on Melbourne for the Australian Open. The first Grand Slam event of the season, the Open has produced its fair share of champions. The men’s singles category tends to draw intrigue, as the world’s top competitors clash in this summer event. The fact that the first major event of the season is played in brutal heat on a hard court demands that the sneakers be equipped to handle both high temperatures and the grueling surface. From the original Jack Purcells to today’s latest Nike creations, these are The Sneakers Worn by the 10 Most Notable Men’s Singles Champs of the Australian Open.