It's the skirt. It makes it look like an apron. If it was predominantly the pink color with subtle uses of the brown color then it would've been better. Not a full on half pink, half brown skirt.
Australian Open 2008
French Open 2012, 2014
US Open 2006
Victoria Azarenka | Petra Kvitova | Angelique Kerber | Caroline Wozniacki | Serena Williams | Heather Watson | Eugenie Bouchard