Tursunov is used to playing every week, so I don't think he'll be in good form. I think Novak would be the favorite against even a healthy Blake. That's a good match-up for Nole.
The tricky one is Korolev.
Tursunov has not played since the AO. Actually he probably won't play at all. He's probably waiting for the very last moment to see how his wrist will be
and I agree Korolev will be the tricky one. he'll have extra motivation after what happened in Vegas.