The German international, described as a 'strategic reinforcement', is seen as a key target as Casemiro is expected to depart. United are also reportedly interested in Elliot Anderson from Nottingham Forest for a potential double addition.
Nmecha's blend of athleticism and technical ability fits the Premier League demands, while his homegrown status from Manchester City's academy adds appeal for registration rules. His expected wage increase from £83,000 to £150,000 per week would place him among United's upper-tier earners.