Though canines love tennis for its bouncy yellow balls, humans appreciate the freedom to bark loudly with each swing and bury their favorite rackets all over the court. Become a tennis beast with today's Groupon: for $22, you get a one-hour private tennis lesson from San Diego Tennis Lessons (a $55 value). This lesson is BYO-racket. Lessons are conducted at the Nighthawk Tennis Courts.

Under the expert tutelage of former pro Brandon Sieh, ball-swatting beginners will learn tennis basics, while rehearsed racketeers will discover new techniques to close out matches and improve their games. During the 60-minute lesson, Brandon, a specialist in women's doubles play, can help better backhands, spring a spin on serves, fine-tune footwork, shine up short angle shots, and key students in on which shade of white tennis shorts proves most distracting to opponents.

A trip to the tennis court also helps to mix up stake fitness routines, engaging a variety of muscle groups to prevent the onset of lopsided calf muscles. Keep asymmetrical sinews guessing with today’s deal to San Diego Tennis Lessons.