Manchester United will increase their bid to Real Madrid for Alvaro Morata to £60 million ($78 million) after their initial bid of £52 million was rejected.
Jose Mourinho has identified Morata as his primary attacking target.
United are understood to be confident of persuading the Real president, Florentino Pérez, to settle for a reduced fee if they can pay the majority of it up front.
Real Madrid bought Morata back from Juventus last summer for £30 million.