Tim Siegel is a former professional tennis player and collegiate tennis coach. Siegel is currently the head coach of the Lubbock-Cooper Independent School District High School tennis team and previously served as head coach of the SMU Mustangs women's tennis team, Texas Tech Red Raiders men's tennis team and Texas Tech Red Raiders women's tennis team. 

Following his time playing for the Razorbacks, Siegel went on to play professionally. With teammate Jimmy Arias, he reached a top 100 world ranking in doubles, the quarterfinals at the U.S. Clay Court Championships, and semifinals in Brisbane, Bologna and Florence. Siegel also reached the third round of doubles at the US Open, Australian Open and the second round of Wimbledon.