Yes i agree on your point regarding fitness. Just take the AO final. Andy was the better player but Nole knew that he could stay there for 5 hours and not too many ups and downs. That means you have to play almost perfect for 5 hours to beat him. Andy best chance nowdays for me is grass I agree. Thats the one surface where he can do different things to a player like Nole.
Rafa needs to play well here. He needs to at least feel he himself can last 5 hours at RG as he did in all past years.