colonel. 1  an officer in the U.S. Army, Air Force, or Marine Corps ranking between lieutenant colonel and brigadier general: corresponding to a captain in the U.S. Navy. 2  a commissioned officer of similar rank in the armed forces of some other nations.
Serena Williams is the winner of 23 Major singles titles â Open Era record. Steffi Graf â winner of 22 Major singles titles, and the only person to win the Golden Slam (1988). Helen Wills Moody â winner of 19 Major titles, the first woman to win more than 10 titles. Chris Evert has won 18 Major titles, tied for the third most with Martina Navratilova in the Open Era.
Won the 1989 French Open to become the youngest-ever winner of a Grand Slam singles title. Incidentally, this was the only Slam win in his entire career! The German is the youngest Wimbledon winner ever when he first won it in 1985. He is currently the current coach of reigning world no. 1 Novak Djokovic.