It shouldn't matter when they player commits an infraction. Nadal did it in the first game so he knew the ump was serious about it.Why don't they feel obliged to abide by shot clock in all matches throughout the year? That is my question? Why, all of a sudden, do they feel obliged to enforce the shot clock and give time violations in the 5th set of the US Open Final - after these guys are running around for 5 hours? The crowd was noisy....and they clock should start after the crowd quiets down. No interruptions from the crowd when they play......I don't care who is playing the finals of a tournament....I don't want a chair umpire influencing the result of the match cause a player took an extra 5 or 10 seconds....please realize these guys are out there for 5 hours.....some of the points were 25+ shots.....give them some leeway and let the chips fall where they may. I don't want an umpire's call to cause a player to lose a match that is going on for 5 hours...that isn't right.