QUEBEC CITY: Canada's Aleksandra Wozniakcruised into the semi-finals and top seeded Russia Nadia Petrovawithdrew from her quarter-final match at the WTA Bell Challenge with an illness. Instead of meeting Russia's Petrova in the semis, Wozniak will face Hungarian Melinda Cink who was handed the win when Petrova did not start the second set because of a virus. Cink had won the first set in a tiebreak. Third seeded Wozniak easily defeated Russian Alla Kudryavtseva 6-1, 6-1 at the 220,000 dollar indoor hardcourt event. Meanwhile, fourth-seeded Lucie Safarova of Czech Republic beat wild card Mattek Sands 6-3, 6-4 and eighth-seeded German Julia Goerges stopped American qualifier Lilia Osterloh 6-2, 6-4. Safarova and Goerges will meet in Saturday's other semi-final.