Here are pictures of the U.S. Open day and night dresses for Maria Sharapova and Serena Williams. Sharapova will wear dusty mauve, which may or may not look good with fluorescent green piping. I would prefer a different color for the piping, but Nike has not consulted me. The night version of the dress has a somewhat different pattern, and is navy and silver (it looks black in this photo). I like the hooded silver jacket.
Williams will wear wear a hot pink--more likely, magenta--dress with black trim during the day, with the colors reversed for night wear.