Barcelona know Juan Mata's demands as he weighs up his options at Manchester United.
The midfielder is off contract in June and is in talks with Barca about a return to Spain.
Mata's father met with the Catalans a fortnight ago and Sport says further talks are scheduled in the coming days.
The midfielder is seeking €5m-a-year to move to Barca this summer.
Brighton and Athletic Bilbao are also in contact with Mata's father, Juan Manuel.