11. Boris Becker
Achievements as a Teen: Boris Becker became the youngest player to ever win the men's Wimbledon singles title at the age of 17 in 1985. He matched that by retaining his Wimbledon title the very next year. This was just the start of one of the most illustrious careers in tennis.
Career Recap: Boris Becker finished with a record of 335-90, amassing 49 titles in his historic career. He reached the pinnacle when he was ranked number one in 1991. He won the Australian Open in 1991 and 1996, and Wimbledon in 1985, 1986, and 1989. He has made three French Open semi-final appearances, and captured a US Open title in 1989. He won Olympic gold in the 1992 games in Barcelona and was hailed as ATP Player of the Year in 1989. He was enshrined in the International Tennis Hall of Fame in 2003.