Originally Posted by veroniquem
If the issue is that it throws the opponent off rhythm, it will do so whether you estimate it's legit or not and it will definitely be worse in the middle of a game. There is no way to evaluate whether breathing issues are more or less legitimate than a bump on the head. It's 100% subjective.
I agree. Its all bout throwing people off rhythm and it traces back to McEnroe and his predecessors Im sure. Anything to gain an edge when margins are thin.