According to Diario Madridista journalist, Eduardo Inda, Manchester United will allow Pogba to leave provided they receive a cash offer plus Toni Kroos.
Inda said: "Zidane has an obsession, which is still Pogba. The French coach is a person of fixed ideas and insists on Paul.
"They will try in January and there have already been the first contacts with United. In the conversations that still exist between emissaries from Madrid and United, a name has been put forward - Toni Kroos.
"United tried to sign Kroos this summer and it is the one that United would ask for as a condition. For him, they offered this summer £75m and that caused him to sign a new contract with Real."