Yesterday I read about the latest "scandal" at the Olympic games in London, that 8 players (4 pairs) have been disqualified from the Womens' badminton championship due to "not using one's best efforts ...
In this video, Roger Federer hits the ball with his head. I know that in tennis, it is allowed to hit the ball with the head. And AFAIK, it's also allowed in table tennis. Can you confirm that? And ...