Tennis Tennis Bertens aces into St Petersburg quarters, gains first Russian win Bertens, who is ranked eighth in the world, fired 13 aces to see off the left-handed Bonaventure 6-4, 6-2 in one hour to record her third win over the 24-year-old in as many meetings and to chalk up her first ever in Russia. AFP Saint Petersburg 31 January, 2019 23:59 IST Kiki Bertens will next meet Russia's Anastasia Pavlyuchenkova. - Getty Images AFP Saint Petersburg 31 January, 2019 23:59 IST Second seed Kiki Bertens of the Netherlands eased into the Saint Petersburg WTA indoor last eight by brushing aside Belgian qualifier Ysaline Bonaventure on Thursday.Bertens, who is ranked eighth in the world, fired 13 aces to see off the left-handed Bonaventure 6-4, 6-2 in one hour to record her third win over the 24-year-old in as many meetings and to chalk up her first ever in Russia.“I've never won before in any tournaments that were held in Russia and I'm really happy to win today,” Bertens said.READ: In-form Kvitova downs Azarenka to reach St Petersburg quarters“It's always difficult to play against left-handed opponents but today I played well, especially in the first set when my serve was working really good.”The 27-year-old Dutchwoman will next meet Russia's Anastasia Pavlyuchenkova, who upset sixth-seeded former French Open champion Jelena Ostapenko of Latvia 6-4, 6-4.Aryna Sabalenka of Belarus, seeded fourth, also cruised into the last eight with a straight-sets win over another Belgian player Alison Van Uytvanck 6-1, 6-4.Sabalenka will next face Ekaterina Alexandrova of Russia who outgunned Czech Tereza Martincova 7-5, 6-2 in a battle of qualifiers. Subscribe to our daily newsletter Get your daily dose of Sportstar with handpicked stories delivered right to your inbox! SUBSCRIBE Please enter a valid email address. Dugout videos