Six clubs enquired about Kobbie Mainoo; United refused loan approaches before the deadline overall.
Manchester United turned down Kobbie Mainoo's loan request; manager said he must stay. club insisted.
Napoli are reported to have asked about Kobbie Mainoo during talks over a Højlund loan in the city.
Kobbie Mainoo is reportedly a transfer-window target for Real and Atlético with loan interest noted.
Mainoo faces a transfer week: five clubs are realistic options as United consider letting him leave.
Ruben Amorim praises Kobbie Mainoo but urges improvement in tempo to secure a first-team spot.
