Manchester United boss Ole Gunnar Solskjaer is working from a shortlist of names as he seeks one midfield addition this summer.
ESPN say Newcastle ace Sean Longstaff, Sporting Lisbon's Bruno Fernandes, Youri Tielemans of Monaco and Atletico Madrid key man Saul Niguez are all targets.
Tielemans is also wanted by Leicester City after last season's six-month loan.
The Red Devils have already signed Daniel James from Swansea, however United are eyeing other deals.
Solskjaer may also need to replace Paul Pogba at Old Trafford with the France international pushing to leave United.