The trouble with Stephens is you never know when any motivation you think she might have will wane. She's not a player I can back because she's had a succession of shocking results since winning the US Open, and there's no question a lot of them have been down to lack of effort. If I had to back her in this one, I'd be a lot happier if she was plus money. Fatigue could certainly be an issue for Svitolina, both in terms of court time here plus recently returning from maternity leave but I think she's a more motivated player than Stephens and that could be what makes the difference. Certainly at odds against Svitolina would be the play for me.