Mourinho usually prides himself on the sturdiness of his back-line but this season has been extremely disappointing in a defensive sense so far, with the Red Devils having conceded 21 goals in 12 Premier League games this season.
Compared with bitter rivals Man City, who have let in just a measly five goals, it’s simply not good enough, and here are a few names that should definitely be on Ed Woodward’s radar from January 1…
The 23-year-old Swiss powerhouse has been in outstanding form this season, having moved to Borussia Dortmund from Basel for a fee of around £15 million last summer.
Akanji’s strength and power is complimented by his ability to play out from the back with both feet, and start attacks from defence, whilst also possessing electric speed.
His impressive form has been a critical factor in Dortmund’s fantastic start to the Bundesliga season, and it won’t be long before some of the continent’s super clubs come calling.
The 20-year-old Brazilian is one of South America’s hottest up-and-coming talents, having made his debut for the Selecao earlier this year.
Usually deployed at centre-back but perfectly capable at right or left-back, Militão has already been linked with Everton, as he continues to impress for current club Porto with his jet-heeled recovery runs and ability to spot danger early.
The Portuguese giants are no stranger to developing exciting, young players from South America and it definitely looks like Militão could be the next star off the conveyor belt.
A much more familiar name to British football fans, with both Chelsea and United having been linked to the Napoli defender for the last 12 months or so.
At 27, the Senegalese powerhouse is approaching the peak years of his career, and his form for the Serie A club has propelled Napoli into genuine title contenders.
Pace, strength, and a genuine goal threat from set-pieces, if any team can prise him away from Napoli, they’d be sorting out their back-line for the next five years.
Matthijs de Ligt
Again, the young Dutch internationalist is a name plenty of fans will already be aware of but it’s high time a club like United made their move for the Ajax prodigy.
Silky, confident and skilful in possession, de Ligt is a throwback to the classy Dutch defenders of yesteryear but he certainly isn’t afraid of a stern tackle either.
He might cost the best part of £100 million, but at just 19, he looks set to be one of the world’s leading centre-backs for the next decade and perhaps even longer.
The rugged 23-year-old Inter Milan man has already been linked with United, as well as a host of other Champions League sides, and it’s easy to see why he’s winning so many admiring glances.
Milan Skriniar’s main attribute is unquestionably his football intelligence. He reads the game superbly, which has seen him coolly deal with Serie A’s plethora of attacking talents.
He seems able to anticipate what opposition forwards will do, he constantly adjust his position in relation to the ball and his teammates, he knows how to distribute the ball and he always seems to be a step ahead of his opponents.
Aside from that, Slovakia international Škriniar loves a stern tackle – and he’s most certainly in the Jose Mourinho mould.
What do you think of our list? Have we missed anyone out?