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10) Michael Chang became the youngest-ever male grand slam champion in 1989 when he won the French Open at 17-years old. He would peak at the No.2 ranking in 1996.
Photo: Getty Images
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9) Andy Roddick won the US Open in 2003 and has reached four other grand slam finals but was overshadowed by greats like Rafael Nadal and Roger Federer. He spend 18 weeks at number one in his career.
Photo: Eduardo Munoz / Reuters
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8) Don Budge was world number 1 five years when tennis was still a strictly amateur sport. He won six grand slams, including a career grand slam.
Photo: AP in English
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7) Arthur Ashe broke racial barriers when he won the US Open in 1968. He would go on to win Australian Open in 1970 and Wimbledon in 1975. He peaked as world number one in 1969.
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6) Jim Courier won four grand slam titles, two in the French Open and two in the Australian Open, spending 58 weeks at number one.
Photo: Getty Images
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5) Bill Tilden, an amateur and professional tennis legend who also succeeded as a coach won 10 Grand Slam titles, including six US Open's in a row.
Photo: Getty Images
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4) Jimmy Connors won eight grand slam titles in his career and spent 268 weeks at number one. He also had a successful career as a coach after retiring.
Photo: Getty Images
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3) Andre Agassi won eight grand slam titles and spent 101 weeks at number one while doing something his bitter rival, Pete Sampras, couldn't: win the career grand slam.
Photo: Getty Images
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2)John McEnroe won nine grand slam titles as he dominated the tennis game in the 1980's, spending 170 weeks at number one.
Photo: Getty Images
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1) Pete Sampras, long time considered the best tennis player of all time, won 14 grand slams and spent 286 weeks at number one. His only fault was never being able to win a French Open title.
Photo: Getty Images
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10) Michael Chang became the youngest-ever male grand slam champion in 1989 when he won the French Open at 17-years old. He would peak at the No.2 ranking in 1996.
Photo: Getty Images
