Andre Agassi significant championships. In 1998, Agassi began a rigorous conditioning program and worked his way back up the rankings by playing in Challenger Series tournaments, a circuit for pro players ranked outside the world's top 50. After returning to top physical and mental shape, Agassi recorded the most successful period of his tennis career and also played classic matches in that period against Pete Sampras and Patrick Rafter. In 1998, Agassi won five titles and leapt from No. 110 to No. 6, the highest jump into the top 10 made by any player during a calendar year. At Wimbledon, he had
Leonardo Mayer one Challenger singles title in 2008 and lost in three other finals. Mayer qualified for his first Grand Slam at the 2009 French Open and beat 15th seed James Blake in straight sets in the first round. He lost to Tommy Haas in five sets in the second round. At Wimbledon, he beat Óscar Hernández in straight sets in the first round. He lost to Fernando González in four sets in the second round. Mayer had a successful American summer, reaching the semifinals of the LA Tennis Open (lost to Carsten Ball) and the quarterfinals of the Pilot Pen Tennis