Courier won the 1986 and 1987 in the Miami Orange Bowl, the unofficial World Junior Championship in tennis. On the side of Jonathan Stark 1987, he won the doubles title of the junior tournament, the French Open, the year after he became a professional tennis player. His first individual title he won in Basel in 1989 by a five- set victory over Stefan Edberg. His next title he won in March 1991 at the direct succession held Masters Series Indian Wells and Key Biscayne. Until 1998, he won a total of 23 individual titles. In addition, he was on the side of changing partners win six doubles titles, including the Masters tournaments of Hamburg, Indian Wells and the Canada Masters. He led in the course of his career in total 58 weeks the tennis world rankings.
His best result at Grand Slam tournaments were the tournament victories at the French Open in 1991 and 1992 and at the Australian Open in 1992 and 1993. At the U.S. Open and at Wimbledon, he reached the finals each. In doubles, he stood twice in the second round of Wimbledon.
Courier graduated between 1991 and 1999 26 single and a double batch for the U.S. Davis Cup team. His individual statistics was 17-10, his only double he won at the side of Todd Martin in the quarter-final match against Belgium in 1998. His greatest successes with the team title wins were in 1992 and 1995, although he was in the finals in 1995 against Russia both singles match against Yevgeny Kafelnikov and Andrei Chesnokov from. Thanks to the victories of Pete Sampras in singles and doubles (along with Todd Martin ) of the title could be won. At the 1992 Summer Olympics in Barcelona Courier represented the U.S. in singles and in doubles. He was defeated in the third round of the later gold medalist Marc Rosset, in a double he failed along with Pete Sampras in the second round by Jordi Arrese and Emilio Sánchez.
Courier, whose trademark was the baseball cap, which he wore at every match, came back in 2000 from professional sports. Since then he has worked as a commentator for various television stations such as NBC Sports and USA Network. 2005 Jim Courier was inducted into the International Tennis Hall of Fame.