WHITFIELD: All right, it may be the most surprising upset in the history of tennis in a visibly painful defeat. Serena Williams beaten in the U.S. Open semifinals, her hopes of winning historic grand slam evaporated. The player that defeated Williams wasn't seed. This winner actually apologized for beating Serena.</s>ROBERTA VINCI, ITALIAN TENNIS PLAYER: I was a little bit sorry for this because for me she cannot reach on the grand slam.</s>ANDY SCHOLES, CNN SPORTS CORRESPONDENT (voice-over): Roberta Vinci who was ranked 43 in the world says she never believed she could beat Serena. She had already booked a flight for Saturday to go back home.</s>VINCI: Maybe I can -- maybe?</s>SCHOLES: But her game plan to keep the ball in play and keep running worked. She played the match of her life.</s>VINCI: I played good today. If you don't play good, you cannot win against her especially.</s>SCHOLES: At 32 years old, Vinci is the oldest in the grand slam finalist in the open era. She's full of energy.</s>VINCI: I like so much coffee.</s>SCHOLES: Right now she's on top of the world.</s>VINCI: I feel good. Maybe I can touch the sky with my finger.</s>SCHOLES: Vinci is a character. She joked after winning the match next time she sees Serena is going to do one of these because she's scared to face her. When serene was supposed to play in the final, the tickets were $280. Now they're down to $45.</s>WHITFIELD: You feel pain for Serena but the same time, Vinci is a spicy character. Can't help but love her personality. All right, Andy Scholes, thanks so much. We'll be right back.
Williams' Grand Slam Hopes Dashed.