Ole Gunnar Solskjaer is still trying to find the ideal partner for Harry Maguire in a bid to create a Premier League title-winning defence.
Victor Lindelof has been used most-consistently alongside the £80million centre back, but Solskjaer is weighing up options from within Old Trafford and outside, with questions over Manchester United’s vulnerability when faced with pace.
Their Norwegian manager is intent on playing with a high line - encouraging his defenders to take risks by playing out from the back. And while United recorded the third best defensive record in the league this season - conceding just three more than champions Liverpool - there remain doubts as to whether it is robust enough to prove the basis of a title challenge.
Solskjaer began the campaign with the intention of giving Axel Tuanzebe chance to stake a claim to partner Maguire.
The academy graduate was immediately promoted above Chris Smalling and Marcos Rojo in the pecking order - leading to both of those players being sent out on loan. But fitness issues have halted his progress when Solskjaer had hoped 22-year-old would make his mark in the manner of Mason Greenwood and Brandon Williams.