Part of the rationale for signing the Brazilian lad, who plays on the wing is possibly down to the rumour Sarr has refused to play. I suppose being Senegal's second best player there (

) must have gone to his head a bit. Still, they've got far more seasons out of him than they could have realistically expected given his ability and their recent yoyoing.
Even if he is not planning on signing a new deal, I'd be surprised if Sunderland sold their number one striker to one of their North East rivals, especially one who could end up competing with them for a potential play off place.
If you are Gyokeres, do you go to Burnley and at best end up being a the worst house on the best street in 6 months and potentially back in the Championship in 18 months or do you continue to do well at Coventry and get courted by Wolves, Southampton, Palace, West Ham, or any other non-top 6 Prem team who may not be facing an immediate relegation fight?
For United, keeping what we have would be good. If you are being greedy then for me, perhaps sending Jebbo out and getting a more experienced play in wouldn't hurt. Also, Fleck is a worry. So if Coulibaly is back soon, maybe that will remove that need and give him a chance to show his worth. We have then Norwood, Doyle, Osborn and Coulibaly not to mention Arblaster.