Third best exercise for tennis?
Bench Split Squats
Place one foot on top of a bench or physioball and the other foot forward in the split squat position. With body weight or dumbbells in hand squat down on one leg. The weight should be in the heel, shoulders back, chest up, and abdominals engaged. The key to this lift is to maintain perfect posture through the spine throughout the movement. Perform three sets of 10 reps each leg.