One of the best foundational hip opening exercises one can put into their proper S&C progression is this exercise. By driving your knee through the ground and applying force kinetically though your torso by holding any implement snug against your body, one can recruit maximal stretch into the groin/hip flexor connection. This should be done first coming off of any season whose sport undergoes inflammation of hip and/or pelvic girdle strain. Apply proper tempo and each rep acts as a PNF activator—meaning each rep increases fascia release. Keep toe flexed and search for more ROM each repetition.