 The rivalry has been called the greatest of the generation of players competing in the 90's, as they were the most successful players of that decade, and had a contrasting playing style, with both Sampras and Agassi being respectively considered the greatest server and the greatest serve returner of their eras.Sampras won 20 of the 34 matches he played against Agassi.The 1990 US Open was their first meeting in a Grand Slam tournament final.