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Agnieszka Radwanska looked little like the player she was earlier in the tournament. As the No. 2 seed in the U.S. Open, the fourth-round match against No. 20 Roberta Vinci should have been business as usual on Labor Day.
But Radwanska could not hold serve, she moved poorly and, early in the 6-1, 6-4 loss, it became apparent she would not hold the day -- even though Radwanska held a 4-0 record against the Italian.
"It's always disappointing, especially when you're losing in a Grand Slam," Radwanska said. "I think I'll have to leave it at that right now."