. ♪ ♪ [ male announcer ] the stella artois chalice celebrates the beer. now the new can... ♪ ...celebrates the chalice. the new stella artois chalice can. bill: and we're back at the usta billie jean king national tennis center. a little bit of a shift change. bill macatee along with mary carillo and john mcenroe. john: mary, the future is now. bill: good to be with you guys. what about that opening set to rafa, 6-4. what does murray have to do now? john: i think it's really important for him to get off to that good start, win that first set. he had the far more difficult, strenuous match. not only mentally, but also physically. the third day in a row they've the third day in a row they've played the best of five. john: besides the mental part of it, the belief and the will. as he said before the match, that he's going to have to dig deeper than he ever has in his life to beat this guy. but he's got to serve better. bill: samantha stosur, the women's semifinal going on at the grandstand, trying to close out that opening set. you said before the u.s. open b