I doubt it'll happen but I'd love us to take a gamble on Joao Felix. Atletico have given his shirt number to Griezmann, so it seems like he's finished there.
Came into a totally dysfunctional Chelsea side in January and showed glimpses of real class. Can play either wing or as one of the 8s.
I know Atletico wanted Bernardo a couple of years ago, so maybe it's not as far fetched as it sounds.
If we have to lose a player as good as Bernardo (or Mahrez), we need real quality to replace them. Not too many options out there.