Jose Mourinho wants to sign a winger before the transfer window slams shut.
He has already failed to land Gareth Bale from Real Madrid or Inter Milan’s Ivan Perisic.
Now the United boss is considering a swoop for Monaco ace Lemar.
Mourinho’s interest is likely to frustrate Arsenal.
Arsene Wenger has been attempting to sign Lemar all summer.
But Gunners chiefs have been unable to agree a fee with Ligue 1 champions Monaco.
According to the Daily Record, Lemar is priced at £54.5m (€60m), with Monaco reluctant to lose another star man.
The France international enjoyed an incredible season last term, providing 14 goals and 17 assists in 55 appearances.
United have been frustrated in their efforts to sign a winger – an area identified by Mourinho that needed strengthening.