By October 21, 2013 1:02 pm ET

Serbia’s Ana Ivanovic reacts as she plays against Switzerland’s Stefanie Voegele during their semi final match of the WTA tennis tournament in Linz on October 12, 2013. Ivanovic won the match 6-4, 6-4 and qualified for the final. AFP PHOTO / ALEXANDER KLEIN (Photo credit should read ALEXANDER KLEIN/AFP/Getty Images)