Naomi has a few niggles and has elected to rest for a few days
Tara is coming back from injury and has changed coaches and set ups - now at Gosling with Katy Dunne. It will take a little time before Tara is fully match fit.
Unless it's a different Will To Win, I'm very surprised. The one I know is a parks based organisation in London focussed predominantly on the grassroots and community aspects of tennis, especially juniors and new players. Not sure who she would hit with or be coached by there.