losses to Bartoli at the China Open, beating the Frenchwoman in straight sets. On her way to the quarterfinals, Ivanovic scored top-10 victory by defeating Elena Dementieva for the second time in 2010. Ivanovic fell to world No. 1, Caroline Wozniacki. Entering the Linz Open as a wildcard, Ivanovic defeated Patty Schnyder in the finals in straight sets, in just 47 minutes of play. Ivanovic headed to the BGL Luxembourg Open as the 4th seed, where she reached the quarterfinals, before falling to 8th seed Julia Görges. Ivanovic revealed that she had ended her coaching relationship with Swiss star Heinz Günthardt, because Gunthardt did not want to travel full-time and mixed his interest in tennis with being a Swiss television commentator. By virtue of her title in Linz, Ivanovic qualified for the last tournament of the season, the Tournament of Champions. She made it to the finals, where she defeated Kleybanova for her tenth career title and her second of the year. She won ten of her last thirteen matches. With her title in Bali, Ivanovic achieved a year-end ranking of No. 17, her fifth finish in the top 20. 2011: Inconsistent form Ivanovic started the year with the Hopman Cup in Perth, Western Australia. She competed along with Novak Djokovic and they qualified for the final, but due to an injury sustained during Ivanovic's match against Justine Henin, Serbia was forced to withdraw. Along with the Hopman Cup, Ivanovic also withdrew from Sydney. Seeded 19th at the Australian Open she lost to Ekaterina Makarova in the first round in 2 hours and 47 minutes. Ivanovic then played in the PTT Pattaya Open, where she fell in the quarterfinals to 5th seed Roberta Vinci in straight sets. In Dubai she lost against Patty Schnyder in their last professional match for many years. She stated the loss was in part because of the abdominal injury sustained in the beginning of the season, and she subsequently withdrew from Doha. In fourth round of Indian Wells Ivanovic beat Jelena Janković, but lost to Marion Bartoli in the quarterfinals. She then played in Miami and lost against defending champion Kim Clijsters in fourth round, despite having a 5–1, 40–0 lead in the third set and having five match points. Ivanovic joined Serbia in the 2011 Fed Cup event. Ivanovic scored a point for Serbia by beating Daniela Hantuchová in straight sets but had to