Koukalová began her clay-court season at the Porsche Tennis Grand Prix. She lost in the first round to eighth seed Sara Errani. At the Madrid Open, Koukalová was defeated in the first round by eighth seed and eventual champion, Maria Sharapova. Seeded second at the Sparta Prague Open, Koukalová lost in the first round to eventual champion Heather Watson. Seeded third at the Nürnberger Versicherungscup, her final tournament before the French Open, Koukalová was defeated in the first round by Polona Hercog. Seeded 30th at the French Open, she lost in the first round to María Teresa Torró Flor.