Defending men's champion Viktor Troicki and top-seeded woman Vera Zvonareva advanced to the quarterfinals of the Kremlin Cup with straight-set victories Wednesday, while Lucie Safarova upset second-seeded Agnieszka Radwanska 6-4, 4-6, 6-4. The second-seeded Troicki beat Pere Riba of Spain 6-4, 6-4, while Zvonareva routed Bojana Jovanovski of Serbia, 6-1, 6-1. With a victory, Radwanska could have secured the last spot left for next week's season-ending WTA Tour championships in Istanbul. Now she will have to wait for Marion Bartoli's results in Moscow this week. Fresh from winning her seventh career title in Osaka, Japan, Bartoli is seeded third and needs to win the title here. Any other result for her will see Radwanska qualify directly for the first time after being a substitute in 2008 and ‘09. Also Wednesday, Kaia Kanepi of Estonia came from 5-1 down in a third-set tiebreaker to upset fourth-seeded Francesca Schiavone of Italy 6-4, 5-7, 7-6 (7), and three-time winner Nikolay Davydenko, seeded fourth, defeated fellow Russian Teimuraz Gabashvili 7-5, 6-2. Troicki will face Alex Bogomolov Jr. of the United States, who beat his doubles partner Mikhail Kukushkin of Kazakhstan 6-4, 3-6, 6-4 to advance. In the last two women's first-round matches, eighth-seeded Dominika Cibulkova of Slovakia defeated Polona Hercog of Slovenia 6-3, 7-6 (3), while Elena Vesnina routed wild card Alla Kudryavtseva 6-0, 6-1. Anderson in quarters Kevin Anderson of South Africa beat Tommy Haas of Germany 6-7 (3), 6-4, 6-4 Wednesday to reach the quarterfinals of the Swedish Open. The 33-year-old Haas put up a good fight in the second-round match but couldn't stop Anderson from clinching a three-set victory. Milos Raonic of Canada is also through to the quarterfinals after beating Philipp Petzschner of Germany 6-3, 6-3. In other action Wednesday, Bernard Tomic of Australia and Grigor Dimitrov of Bulgaria advanced to the second round. Tomic needed three sets to beat Estonia's Jurgen Zopp 7-6 (5), 4-6, 6-0 while Dimitrov defeated Ryan Sweeting of the United States 6-3, 6-1. Pavlyuchenkova upset Rebecca Marino of Canada caused an upset at the Luxembourg Open Tuesday by knocking out second-seeded Russian Anastasia Pavlyuchenkova 1-6, 6-3, 6-3. The 20-year-old Marino had lost in the first round in seven of her last eight tournaments. Eighth-seeded Daniela Hantuchova also went out, beaten 6-7 (3), 7-5, 6-1 by Lucie Hradecka of the Czech Republic. Elena Baltacha of Britain served for the first set against sixth-seeded Julia Goerges but eventually went down 7-5, 6-1.