This guy has a great serve and everyone knows it. The truth is: he's trying to play the classic "I can win when I'm not playing my best" routine... a phsyc game to put mental pressure on future opponents. A guy like this wants as much media coverage about how good he is. The more positive reinforcment, the more "factor" he becomes in the mind of future opponents. This won't matter much with his next opponent (Andy), who has already figured out that all he has to do is exploit Milos reletive weak movement, serve and return well (which he's been doing consistnatly as of late)
2012 U.S Open Men's Singles Champion, 2012 Olympic Gold Men's Singles Champion, 2013 Wimbledon Men's Singles Champion...