Stella McCartney has partnered with Adidas since 2005, creating decidely non-preppy designs for the court. I love how Wozniacki's outfit was sophisticated (the drapey top) yet romantic (that muted rose color, the tiered skirt). The effect was almost Gatsby-esque, and certainly a welcome change from the neon brights and skin-tight fits usually seen on the court.
The Open marked Wozniacki's debut as the new face of McCartney's designs. Check out the collection here.