Manchester City are fuming over Jadon Sancho's summer move to Borussia Dortmund.
The Sun says Sancho's deal was so hastily thrashed out that Etihad chiefs could not insert the clauses in.
A City source said: “Jadon does not appear to have a sell-on clause of buy-back to the club in his contract.
“Nobody at the club is aware of anything in the deal. Dortmund got him on the cheap for the potential he has.
“We did not have much leverage as he was refusing to sign a new contract and had fallen out with people here."
Sancho is seen as one of the stars of the future after impressing for England at the Under-17 World Cup.