Serena has no sportmansip. She yells at the opponent, hits them with the ball makes a drama about anything...
Besides, she is calling Martinez Sanchez a cheat and making such a fuss about this. What right has she to insult the other player and make everyone point at her as cheater. She won the match so she should forget about it and move on, and not act as if she were a 10 year old girl.
There are more ways to be a good player than accusing other players of cheating. serena williams labels maria jose martinez a "cheat" after her match at the interveiw