Greenwood, 18, equalised for the hosts after Junior Stanislas' shock 15th-minute opener before scoring United's fourth with a superb effort after half-time when he took on Diego Rico on the edge of the area and cut a right-footed shot back across goal into the far corner.Marcus Rashford had put United 2-1 in front from the penalty spot and Anthony Martial then increased the advantage with a brilliant curling effort into the top corner just before the break.In an action-packed game, Joshua King p