Manchester United's ranks are set to be added to in January as Amad Diallo is expected to complete his move from Atalanta. But the Red Devils' business may not end there, as manager Ole Gunnar Solskjaer is keen to strengthen his options in central defence and at right-back.
Dayot Upamecano and Kalidou Koulibaly have long been linked with the switch to Old Trafford, though neither star appears likely to leave their club in January.
Instead, Solskjaer and executive vice-chairman Ed Woodward may turn to one of La Liga's highest-rated defenders to solve his centre-back issue, while re-signing a familiar face provides another option.
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