Sampras overshadowed Agassi in terms of titles and prolonged domination, but victory in the 1999 French Open saw the Las Vegan succeed where Sampras, Bjorn Borg, John McEnroe and Jimmy Connors all failed.

By winning the 1999 French Open, Agassi became only the fifth man to win all four Grand Slam titles, joining Rod Laver, Fred Perry, Roy Emerson and Don Budge - who all achieved it when three of the four tournaments were on grass.

"He has a right to say now that he's a greater player than Sampras," said Ukrainian Andrei Medvedev following his defeat to Agassi in the final. "It's an argument he deserves to have."