PARIS, FRANCE - MAY 29: Donna Vekic of Croatia serves in her Women's Singles match against Ana Ivanovic of Serbia on day six of the 2015 French Open at Roland Garros on May 29, 2015 in Paris, France. (Photo by Julian Finney/Getty Images)
PARIS, FRANCE - MAY 29: Donna Vekic of Croatia serves in her Women's Singles match against Ana Ivanovic of Serbia on day six of the 2015 French Open at Roland Garros on May 29, 2015 in Paris, France. (Photo by Julian Finney/Getty Images)