Manchester City would receive 40 per cent of any transfer fee if Real Madrid decide to sell Brahim Diaz to Manchester United.
The Spain international, 23, is currently linked with a potential move to United. Brahim's loan spell at Serie A champions AC Milan will end next summer and the playmaker must decide on whether to stay with the Rossoneri, return to the Spanish capital or continue his career elsewhere.
Brahim, who has three years left on his existing deal, came through the ranks at City before completing a £15.5million move to Real in January 2019. As reported at the time, City included an 'anti-United' clause in the deal to deter Real from selling him to the Red Devils.
