United have been heavily linked with striker Antoine Griezmann and goalkeeper Jan Oblak and a mega-money double offer has been widely reported.
Aaccording to Spanish paper Don Balon, United boss Jose Mourinho has now taken a shine to pacy wideman Carrasco too.
The 23-year-old has caught the eye this season, scoring 10 goals in 30 La Liga outings.
And Atletico know that the Belgian would fetch a huge profit on the £15m they paid Monaco for him just two years ago.
It has been suggested that the Spanish capital club believe they could pocket around double that if they sold Carrasco this summer.