General principle no matter which tournament, I would tell him. "Never let them see you sweat." I am not talking about body liquids. Other players see Andy bad reactions and frustrations as sign of weakness and it gives them very much hope. I know if I played Andy and heard and saw him like this, I would use moment to jump on him. So yes, Andy needs to stop this in my opinion. I think he was much better under Lendl. But it is coming out again. He needs face of stone.
Hang on, your masterclass. LOL.