World number two Caroline Wozniacki got some much-needed rest on Thursday when her New Haven Open quarter-final opponent Flavia Pennetta withdrew with a foot injury.
Wozniacki, who will be the top seed at the U.S. Open next week, is coming into New Haven, after a semi -final, and final win at the rain soaked Montreal Open. Italian Pennetta was very reluctant to pull out of the tournament but said she wanted to give herself every chance of playing at the U.S. Open and not aggravate her injury any further.
"I decided to pull out and not risk any further damage. The good news is there's no stress fracture. The toe on my right foot is just very inflamed. "With some rest and lots of physiotherapy in the next few days, I hope to be ready for the U.S. Open."
Dane Wozniacki, last year's New Haven champion, was joined in the semi-finals by three Russians.
Fourth seed Elena Dementieva took nearly three hours to overcome sixth seed Marion Bartoli of France 6-3 3-6 6-2, while eighth seed Nadia Petrova breezed past Australian second seed Samantha Stosur 6-2 6-1.
Maria Kirilenko came out on top of an all-Russian clash, thrashing former world number one Dinara Safina 6-3 6-3.
In the men's quarter-finals, Ukraine's Sergiy Stakhovsky toppled top seed Marco Baghdatis of Cyprus 5-7 6-1 7-6. The Netherlands' Thiemo de Bakker was an easy winner over Kazakhstan's Evgeny Korolev 6-4 6-3 while 15th seed Denis Istomin of Uzbekistan outlasted Teymuraz Gabashvili of Russia 6-1 3-6 7-6. In the other quarter-final, Viktor Troicki beat Radek Stepanek 6-2 6-3.