For the first, see Washington v. Alaiimo. For the second, see State v. Law. For the latest, see this quote from champion boxer Juan Manuel Marquez, as reported in BoxingScene.com (though I admit that this likely won’t get to court):
[Trainer Freddie] Roach told me if I would would come out clean in the anti-doping tests, he would kiss my ass. The Nevada Commission has announced that both Pacquiao and I were negative for doping. That means Roach has to kiss my ass, and then some. He openly said that I had doped, and now he has to pay the consequences.
Rob Green (Abnormal Use) explains why a court would not indeed order Roach to kiss Marquez’s ass.