Manchester United have made initial enquiries about a possible move for Borussia Dortmund defender Manuel Akanji.
United have been prioritising a defensive midfielder and a striker for the summer but talks over Swiss international Akanji indicate Ralf Rangnick wants a new centre back also.
Defender Phil Jones is still hoping to leave despite turning down a move to Bordeaux last month while Eric Bailly remains unhappy at his limited playing time.
Question marks have also been raised by Rangnick regarding the level of Harry Maguire's performances and an experienced defender such as Akanji would increase competition.