Manchester United have stepped up interest in Ajax striker Kasper Dolberg.
The Daily Mail says United sent their chief scout to watch Dolberg last week.
It is thought that head of global scouting Marcel Bout was sent to Thursday's Europa League fixture as Dolberg scored for Ajax against Celta Vigo in the 3-2 victory.
Chelsea are also watching the Dane.
Blues transfer adviser Piet de Visser has been keeping personal checks on Dolberg this season.