1 (February 20, 1992) Grand Slam results Australian Open W (1992, 1993) French Open W (1991, 1992) Wimbledon F (1993) US Open F (1991) Doubles Career record 124–97 (at ATP Tour, Grand Prix tour and Grand Slam level, and in Davis Cup) Career titles 6 Highest ranking No. 20 (October 9, 1989) James Spencer "Jim" Courier, Jr. (born August 17, 1970) is a former world number one professional tennis player from the United States. During his career, he won four Grand Slam singles titles – two at the French Open and two at the Australian Open. He holds the record for being the youngest person to have reached the finals of all four Grand Slam singles tournaments. He also won five Masters 1000 series titles..