month after this performance, Flipkens reached a career-high ranking of 13th in the world. In the first round of the Canadian Open, she beat Venus Williams and reached the quarterfinal before losing to world No. 1, Serena Williams. She began the US Open as 12th seed. However, she was beaten in straight sets in the first round by two-time champion Venus Williams, who took revenge for her loss against Flipkens two weeks earlier in Toronto. In October, she reached the quarterfinals at the Linz Open, losing there to Carla Suárez Navarro. In December, she took part in the Kim Clijsters Invitational, an exhibition tournament where she won against Ana Ivanovic in a singles match and lost against Kim Clijsters and Xavier Malisse, whilst partnering Henri Leconte in a mixed doubles match. She finished the year as world No. 20. 2014–15: Solid results Flipkens began the year by reaching the semifinals at the Auckland Open, losing 0–6, 6–7 to Ana Ivanovic. The next week, she reached the quarterfinals of the Hobart International, before losing to Garbiñe Muguruza. She then beat Laura Robson in the Australian Open, where she ended up reaching the second round in which she was defeated by Casey Dellacqua. In February, she made it into the quarterfinals of Open GDF Suez in Paris, but lost to Maria Sharapova. Month later, she reached the fourth round at the Miami Open, before losing to Sharapova again. In the French Open, Flipkens lost in the second round to Julia Glushko. Flipkens withdrew from the second round in doubles, with Dominika Cibulková, after she had fainted on court during training and doctors at the site had sent her to the hospital where she would spent the night on intensive care since heart problems were feared. However, later tests revealed that she was healthy and fit to play. Flipkens started grass-court season with the quarterfinals of the Birmingham Classic, where she was beaten by Barbora Záhlavová-Strýcová. Next week, she reached second round of the Mallorca Open, being knocked out the tournament by Elina Svitolina. At Wimbledon, she won against two lower-ranking players in the first two rounds, before losing to No. 9 seed Angelique Kerber. In the second half of the season, Flipkens was less successful. As a wildcard in the tournament of Connecticut Open in New Haven, she made it into the quarterfinal after an epic match against Andrea Petkovic but was