former world number one and 2008 french open champion ana ivanovic caused the biggest upset of the tournament thus far, coming from a set down to defeat world number one, five-time australian open champion and 17-time grand slam champion serena williams for the first time in five attempts. her victory not only ended williams' 25-match winning streak, which had dated back to cincinnati last year, but also earned worldwide recognition and was one of the most discussed matches on social media, beating the record previously set during the 2012 australian open men's final. it was later revealed that williams had played through the match with a back injury, which affected her performance in this match.