Valencia and Darmian both expire now, I think. Would be odd if we extend with either of them. Ole hasn't mentioned them, iirc.
Can't remember him saying anything about Rojo either, so might presume we're looking for a buyer there (he still has a couple of years on his contract, afaik.).
Pereira expires now too - has Ole said anything about him recently?
Then there's the Spanish trio. Ole has said, recently, that he wants to keep all three (that would include Mata - yes).
The issue with Mata is apparently that he wants a longer deal - but, again, Ole isn't looking to ship him out.
Very likely gone, then:
Valencia, Darmian
Likely not in Ole's plans (but needs a taker):
Rojo
Unknown status (but contract expires):
Pereira
People who want Young, Smalling and Jones gone are dreaming, in my opinion. No indication of that happening, recently extended contracts for all three.
Edit We triggered the option for Pereira, so ignore the above with regard to him. Could still sell him, of course, but Ole's remarks when he took over as caretaker seemed quite positive - and he's been getting minutes, so.