World number 1 Caroline Wozniacki retired yesterday against Sofia Arvidsson in the second round of the Swedish Open. Wozniacki won the first set 6-2, but early in the second set, had to stop playing because of a shoulder injury. Arvidsson went on to defeat Maria Jose Martinez Sanchez 4-6, 7-6, 7-6 today in the Bastaad quarterfinals. Also winning in the quarterfinals was 7th seed Barbora Zahlavova Strycova, who upset 2nd seed Flavia Pennetta 6-4, 5-7, 6-3.
In Budapest, the top two seeds--Roberta Vinci and Sara Errani--won their second round matches today.
Wimbledon champion Petra Kvitova has withdrawn from next week's Gastein Ladies event, which begins next week in Austria. Kvitova sustained a leg muscle injury during her time at Wimbledon, and withdrew from the Austrian tournament because, she says, she needs to rest and let the muscle heal.