If Novak stays injury free who will be his rival ??We all know deep down is Fedal wont be but who ?? I think Thiem on clay and Zverev on other surfaces.After today ı wont even surprised Rafa wants avoid this match up in the future.Fed ı dont think he would that much interested to involved in this age nearly 38 either.My tips for Novak rival is Thiem on clay and Zverev on other surfaces.