Manchester City boss Pep Guardiola has joked about Omar Berrada's defection to Manchester United.
Berrada has left City as chief football officer to become United's CEO.
Guardiola smirked: "Obviously his knowledge goes to United, that's the reality.
"When you buy a player from another club you buy the knowledge that this player has had in the past with other managers and team-mates. That is normal.
"We will adapt and adjust and move forward.
"But Kevin de Bruyne is still in Manchester City. De Bruyne will play here. Erling Haaland will play here. So, in the end, it's not that simple.
"Maybe United think with this person everything is going to change congratulations. I don't know if this is going to happen.
"If it does happen then oh my god, they have to make a stand for Omar Berrada because he'd deserve it."