Photo Study of Novak Djokovic's Strokes

Novak Djokovic uses a 2/3 Western grip, a little closer to Semi-Western than Western. With any forehand grip from Eastern through Hawaiian, the racquet face should naturally point downward at the farthest back point of the backswing for a topspin stroke, because the racquet face naturally opens up as you swing forward, and by starting off facing downward, it ends up vertical at contact. The more Western the grip, the more pronounced the downward angle.