According to Martin O'Neill and reports in todays media he's still not 100% confirmed either way yet.
Pellegrini has only played Rice as a DM midfielder since he has taken over as coach. Though having players who can play a number of positions is useful in a knock out competition. Personally...
Rice is still undecided if he wants to play for England or continue with Ireland. Also he's primarily a midfielder.
Tarkowski's carrying an injury, and it wouldn't be surprising if Dunk's been put on 'standby'.