Totally. Harmless.
Good on Eugenie Bouchard for playing along.
Playing. Along, folks. Playing.
It wasn’t sexist, or demeaning. It was, and is, precisely what sports needs. A little ‘play’ after some hard work under the hot Aussie sun.
(Not to be included, though, are men’s tennis players ‘twirling’, as Serena Williams suggested. Let’s not get stupid, here.)