Manchester United still recognise Luke Shaw as their first-choice left-back ahead of the expected arrival of Tyrell Malacia.
United have agreed a €15million (£12.9m) deal to sign left-back Malacia, 22, from Feyenoord amid firm interest from Lyon.
Malacia is seen as credible competition for Shaw, who turns 27 next month and has failed to maintain sustained form in consecutive seasons during his eight years with United.