Tennis v Football

I have just watch Jokovick play Nadal in the final of the Australian Open Tennis. After almost six hours of playing they finally got a winner. Both had played long matches a few days before. How can football club managers moan about their over paid stars having to play two matches a week? Somebody like Andy Carrol can lumber round the field for three quarters of an hour, resting between short bursts of activity and then sit in the dressing room for twenty minutes. The footballers will have to learn from the tennis players and give up all this whinging!