Me to, think he ran out of gas, so many unforced errors = tired, to his credit, Medvedev did execute also, looked good and had far more in the tank. I know Novak's in great shape but I wonder if the matches caught up with him. Medvedev only dropped one set in the tournament and his longest match was 2:23. Novak had 4 longer than that, three of which were over 3 hours and the 4th was 2:59. Four successive matches too (3rd round through the semis). He's not old at 34 but he's also not 27 anymore. Then couple that with the pressure of going for the calendar Slam. It's a lot.