Tennis fans across the world spent much of the 1990s watching Pete Sampras raking in all the big titles on the ATP tour, including a series of grand slam wins that saw 'Pistol Pete' develop a reputations as a virtually unbeatable player. No sooner had Sampras hung up his racquet when in walked a young Swiss player by the name of Roger Federer, who proceeded to take up where Sampras had left off and single-handedly dominate men's singles tennis.