This exercise will improve the tissue extensibility throughout your calf muscles and fascia and is a great prep to do before stretching.
Start in a half kneeling position and massage the back of one leg both high and low. Roll using firm pressure to locate tender spots or tight areas throughout your calf. Massage each tender spot for 30-60 seconds. Perform for 2 minutes on each leg. *Pro tip- to improve dorsiflexion of your ankle for a better deep squat, focus massaging around the Achilles tendon to reduce tension and tightness there.