I have absolutely no logical or evidentiary reason for saying so, but I think Johanna will win that match. Strangely positive from me - we'll see how that turns out!
Neither Johanna or Naomi (or the Brit men) play today (I think, see below), so it will be 3 days three matches for them.
NB: The USO website for draws and schedules seems perversely unwieldy to me. You can't see the whole of the information at once, or search for a single player - even on The 'printable' versions. Which seems a pretty shoddy effort for such a grand event.