Isco.
Maybe Mark can give us the percentages. Hazard is unlikely, but I guess we could get Isco if we sold Pogba. Not really sure if he's a solution.
If we were forced to sell Pogba, I'd much rather insist on selling Pogba to PSG and getting Verratti in return. Getting Isco, Kovacic or Kroos from Real doesn't sound particular exciting in comparison.