She’s wearing the shorts.
Maria herself revealed it in a recent interview.
Q. What outfit are you planning to unveil?
MARIA SHARAPOVA: Changing it up this year. I’m going with the traditional shorts, believe it or not. I’ve never worn shorts at a Grand Slam. I’m gonna be debuting that. Call it menswear, obviously. It’s kind of like a tuxedo look, very simple lines, classic.
Huh. Who would’ve guessed?