Nole's a piece of trash when it comes to sportsmanship, make no mistake about it. He frequently retires when he's behind, he shows no respect to Fed, and he and his piece of trash mother insult Fed in the media. Need I say more.
1. On retiring, come on, this is common knowledge already. And he deserves every piece of criticism he gets bc he does this more than anyone else on the ATP tour. Did Nadal retire last year in Hamburg? No, he was exhausted after a grueling clay court season but he had the decency to finish the match. Like others said, Djokovic doesn't get flak because he's #3 and has beaten Fed recently, it's because he truly has no sense of decency and bc he has a track record of poor sportsmanship.
2. The fact that he makes insulting comments toward Fed during press conferences just underscores all of this. "The king is dead" (or was that his mom that said that). It's totally cool to want to be #1 and to beat Fed on the court, but show some respect for the guy who has 12 grand slams and is widely considered to be in the top two or three players of all time. Fed can be arrogant, but he's always shown respect for folks like Sampras, Borg, Laver. When you're playing a game and making millions from it, I think you should respect the great players who came before you and made it possible for all these tournaments and prize money to exist. Without the great players who preceded you, there would be nothing. So he should show some damn respect. Nadal has taken 2 (or 3, if you count the 2005 FO) GS's from Fed. And you know what, I love the guy. He plays with heart and guts and he shows respect for his opponents. Yes there has been controversy with Nadal in the past, but nothing near as bad as the joke that is Djokovic.
3. His mom should stay home if she can't behave with at least a bit of class. Proclaiming that his son is the best is stupid and crass. She has no business making these comments. It just shows that she doesn't even have a day job or something substantive enough to keep her mind occupied that she talks to the press about tennis players. If she had been a top pro then at least you can say that she has earned some right to spout some controversial views about the men's game, but for all we know she doesn't even play tennis and she's just trying to attract attention, which is pretty sad really. The fact that Novak's parents are at every tournament also tells me that they don't have day jobs worth holding on to. Which is fine, but it does seem to say they have nothing better in their lives than their son's tennis which to me, is a bit sad.