Originally Posted by Mahboob Khan
In certain cases close stance (Djokovic) will work if the left leg would come along so that he finishes in open stance. If the left leg will not come along the right thigh will not clear and the stroke will be inhibited.
I think that's a big reason why early weight transfer onto the front leg is so important. This is why I'm suspicious of the "left-handed forehand" analogy.