If you have a friend who loves to hit the courts to play tennis, give him a tennis-related gift for his next birthday, big holiday or special event that he celebrates. Tennis players often are athletic, competitive and playful. Incorporate those elements into a novelty gift that is both entertaining and useful to your friend's game.
T-Shirt, Mug, Water Bottle or Key Chain
Purchase a novelty T-shirt, coffee mug or water bottle with a tennis-related message, or design one with your own message at a site such as Zazzle.com or a local shop. Try messages such as "LOVE means nothing to a tennis player" or "Tennis Chick" with a baby chicken image. You could also buy a key chain with a miniature tennis ball.
Tennis Gumball Machine
Purchase a tennis gumball machine for a tennis player's desk at work or study at home, as seen at gumballmachinefactory.com. It features a tennis racket as the shaft for retrieving the gumball and is topped with a tennis hat. Fill the machine with custom gumballs made to look like chartreuse tennis balls.
Glow-in-the-Dark Tennis Balls
Purchase a set of glow-in-the-dark tennis balls for a tennis player who is serious about his game--and has a silly side. These balls, which can be found at Petco.com and other sites, can be used to play night tennis without court lights, a game of catch or fetch if your friend has a dog.
Tennis Ball Cake
Make or purchase a three-dimensional tennis ball cake. If you make it, you'll need to buy a specialised pan from a cake pan manufacturer, such as Wilton.com. Use various colours of icing and piping tools to decorate the three-dimensional ball to look like a real tennis ball.