Three-time European champions Manchester United have made the addition of a new centre back their major target in the transfer window with several players linked to fulfilling the role at the Theatre of Dreams this season.
Popular media portal ESPN have revealed a four-man centre back shortlist for Manchester United in their quest to boost their squad defensively.
Napoli defender Kalidou Koulibaly, Inter Milan star Milan Skriniar, AC Milan player Alessio Romagnoli and Leicester City defender Harry Maguire are all on the shortlist.
The Red Devils have had one of their worst defensive outings in the Premier League since the competition began during the 1992/93 season.
Manchester United have one of the worst defensive records in the league this season after conceding 32 goals in just 21 games this term.
The defensive record has improved since former striker Ole Gunnar Solskjaer was appointed the Manchester United manager until the end of the season.
Norwegian tactician Solskjaer was made the interim Red Devils boss in the wake of the sacking of former manager Jose Mourinho.
The former Real Madrid and FC Porto boss was relieved of his duties as the Manchester United manager after a disappointing start to the season.
His team conceded 29 goals in just 17 league games under Mourinho but the Red Devils have since conceded just three goals in four games under Solskjaer.
Manchester United want to strengthen the squad defensively despite the recent improvement in the defensive part of the team.