AC Milan captain Alessio Romagnoli is back on the agenda of Premier League clubs.
The Daily Mail says United could be set to join the race for Romagnoli - but they will have a fight on their hands with Juventus also keen and Gennaro Gattuso desperate to keep him.
Chelsea, who will appeal their two-window FIFA transfer ban, also want the 24-year-old central defender, according to reports in Italy.
United have long been in the market for a new centre half with Eric Bailly, Victor Lindelof, Chris Smalling, Marcos Rojo and Phil Jones the current crop at Ole Gunnar Solskjaer's disposal.
Former United manager Jose Mourinho wanted Leicester and England defender Harry Maguire last year while Napoli's Kalidou Koulibaly is also on the radar.