Here's a provocative one for all you tennis fans out there.
I am always puzzled when I see tennis referees or players asking for spectators to be silent and not to move during the game. Why do they hate it so much when the audience makes noises or moves while they play? Even stranger is their obsession with spectators since the fact their opponent screams during the game does not seem to bother that much, or, if it does, nothing is said about it (example here).
Is it because tennis players are not as good as other athletes at concentrating and keeping their focus?