Each year, the champion of the Australian Open men's singles receives a miniature replica of the silver-gilt Norman Brookes Challenge Cup, named after the 1911 champion and former Lawn Tennis Association of Australia president, and modeled after the Warwick Vase. The inclusion of professional tennis players in 1969 marked the competition's entry into the Open Era, in which Andre Agassi, Roger Federer (pictured), and Novak Djokovic are tied with the most titles at four. The Open Era record for most consecutive titles is three by Djokovic. The Australian Open court surface changed once, from grass courts to hardcourts in 1988. Mats Wilander was the only tennis player to win the event on grass and on Rebound Ace surfaces, which he won twice on grass and once on the Rebound Ace. Federer is the only player to have won on both the Rebound Ace and Plexicushion tennis surfaces. In 2010, the winner received prize money of A$2,100,000. (Full list...)