Manchester United are in the market for a new left-back this summer as the club reportedly remain concerned about the fitness of Luke Shaw and Tyrell Malacia. Last season for Manchester United, Luke Shaw and Tyrell Malacia had a plethora of injury problems for the Red Devils which led the club to sign Tottenham left-back Sergio Reguilon on loan. Shaw’s injury issues have been well documented with the Englishman missing over 200 games for the Red Devils and a new full-back looks to be on the agenda. United have been linked with a plethora of left-back options, these include bringing back Reguil…