Fair play crucial foundation of sportsmanship

Even after a visibly shaken Chinese tennis star Zhang Shuai retired from a match against Hungarian Amarissa Kiara Toth in the Hungarian Grand Prix on Tuesday, a video clip of their contest is making waves on social networking sites.

What triggered the interest was Zhang's protest to the judge after a forehand she hit appeared to hit the line, but was ruled outside the line. Even the chair umpire took a look and ruled the ball was out.

Zhang was not happy with the verdict and asked to speak to a tournament supervisor, but despite her protests Toth walked up to the ball mark and erased it with her shoes.