Let Muzza do whatever he wants, when he feels miserable and frustrated on court. I and many people do similar things when they are not feeling well or feel uncomfortable back, shoulder, arm, etc.
If he is grabbing his leg, back or jerking his cock between the points, it's not your business, you don't know how he's feeling, so you have to accept it and play on like it's nothing.
: Yes, I'm a girl. Profile pic is me. I watch and play tennis since 13 (1997). I don't play ITFs anymore, I have a job now. MTF-> uncovering my naughty side since 2007.
Slovenia's finest: Grega Žemlja, Aljaž Bedene*, Blaž Kavčič; Anže Kopitar, Goran Dragič, Tina Maze, PETER PREVC,
WTA tour: Association of tennis players without variety, defensive skills and with random winners.