reached the third round before losing to Li Na, 6–2, 2–6, 1–6, the first time she had ever won a set against her. She lost in the third round of the French Open to Victoria Azarenka, 3–6, 2–6. Her next major success came at the UNICEF Open where she was the seventh seed. After wins over third seed Yanina Wickmayer and fifth seed Dominika Cibulková in the quarterfinals and semifinals, respectively, she beat Jelena Dokić in the final. This was her second title of 2011 and her first title on grass. As the 29th seed at the Wimbledon Championships she reached the third round where she lost to eighth seed and eventual champion Petra Kvitová, 3–6, 3–6. Her first post Wimbledon event was at Budapest where she was the top seed. She beat third seed Klára Zakopalová and then seventh seed Irina-Cameilia Begu in the final, 6–4, 1–6, 6–4. This was her third tour title of the season. Vinci began the American hardcourt swing in Carlsbad as the ninth seed. She was upset in the second round by Zheng Jie. In Toronto, she scored the biggest win of her career, beating defending champion and world No. 1, Caroline Wozniacki, 6–4, 7–5, in the second round of the Canadian Open. In the second set, Vinci rallied from 1–5 down and saved multiple set points, before going on to win the match. In the third round, she defeated former world No. 1, Ana Ivanovic, 7–6, 6–2. She lost in the quarterfinals to tenth seed Sam Stosur, 4–6, 1–6. As the 18th seed at the US Open, Vinci made it to the third round. In the first round, she defeated Irina-Camelia Begu, 6–3, 6–4. She then defeated Alizé Cornet, 6–2, 6–3. In the third round, she was sent home by Andrea Petkovic, 6–4, 6–0. Despite losing in the third round, this was Vinci's best performance so far in the US Open. She qualified for the Tournament of Champions and was seeded fourth, but lost to eventual champion Ana Ivanovic, 3–6, 3–6 in the quarterfinals. 2012: World No. 1 in doubles, first Grand Slam singles quarterfinal Starting the year at Auckland, she was seeded sixth and defeated Rebecca Marino in the first round before falling 3–6, 4–6 to unseeded Elena Vesnina in the second round. Roberta then suffered early round losses at the Apia International Sydney and the Australian Open to Daniela Hantuchová and