Once upon a time, women's tennis was a genteel version of the men's game. All that changed with the Williams sisters. Venus and Serena overpowered opponents with their strong baseline play, forcing other ladies to up their game. But Serena also has a reputation as a hothead. On Sunday, she hurled insults at the umpire when a call didn't go her way. She was fined just $2,000. A slap for the wrist for Serena, who won $1.4 million at the tournament as runner-up. Some are outraged by Serena's behavior.