I think Pliskova might be her biggest threat. Not that she'll win any grand slams necessarily or be the best player, but she has accrued a lot of points and been in generally good form, whereas most others have been a little bit up-and-down.Has an 1,100 point lead over Kvitova and Petrova in the Race, and 1,500 over Osaka. That's a pretty amazing position to be in by June when clay is supposedly your worst surface.
With Kvitova still under a cloud for Wimbledon and Osaka garbage on grass, at this stage you wouldn't be betting against Barty for year end number one.
Not a lot of the usual grass suspects are in form atm. I think Konta is the player she will want to avoid in her section of the draw.Barty should be fav for Wimbledon. (she is, finally)
just outstanding form. I reckon her actual worst surface would be a fast hardcourt. It would allow those big hitters to outhit her more often.