Tennis players are often passionate about their sport, and there are many great gift ideas that cater to their love of tennis. Some popular options could include new tennis equipment or accessories, a gift card to a favorite tennis shop or resort, a book or DVD about tennis technique or history, or a subscription to a sports or fitness magazine. For the tennis player who loves to compete, you could also consider a trip to a tennis tournament or a gift certificate for a tennis lesson or clinic. Other ideas could include a tennis-themed board game or puzzle, a tennis-themed coffee mug or water bottle, or a collection of tennis-themed movies or TV shows. Ultimately, the best gift will depend on the recipient's interests and personal style, as well as their connection to tennis and athletics.