SuggestedLeadIn: Reaction from Serena Williams after she suffered one of the greatest shocks in tennis history as unseeded Italian Roberta Vinci ended the American's hopes of a calendar Grand Slam with a stunning 2-6 6-4 6-4 victory in the US Open semi-finals.

Script: SOUNDBITE (English) Serena Williams, lost 6-2 4-6 4-6 to Roberta Vinci:

(Question: How disappointed are you?)

"I don't want to talk about how disappointing it is for me. If you have any other questions, I'm open for that."

(Question: How well did she play today?)

"I thought she played the best tennis in her career. You know, she's 33 and, you know, she's going for it at a late age. So that's good for her to keep going for it and playing so well. Actually, I guess it's inspiring. But, yeah, I think she played literally out of her mind."

SOUNDBITE (English) Serena Williams, lost 6-2 4-6 4-6 to Roberta Vinci:

"I don't think I played that bad. I made more unforced errors than I normally would make, but I think she just played really well. She did not want to lose today. Neither did I, incidentally. But she really didn't either."

SOUNDBITE (English) Serena Williams, lost 6-2 4-6 4-6 to Roberta Vinci:

"No. I told you guys I don't feel pressure. I never felt pressure. I don't know. I never felt that pressure to win here. I said that from the beginning."

SOUNDBITE (English) Serena Williams, lost 6-2 4-6 4-6 to Roberta Vinci:

"Well, thank you. Like I said, I felt very happy to get that win at Wimbledon, you know. I did win three Grand Slams this year. Yeah, I won four in a row. It's pretty good. Yeah, so it's definitely the positive. Thank you."