Manchester United are strongly linked with a transfer for Harry Maguire.

But signing the defender is proving harder than the Red Devils envisaged as they cannot agree on a fee with Leicester City for the centre-back.

United made a £70million bid for the England international's services, but this was promptly rejected by the Foxes. Leicester are holding out for £80m, which could rule United out of a deal for Maguire entirely.

This won't be the first time United miss out on signing Maguire, should they fail to do so in this summer's transfer window.

Jose Mourinho failed last season, and before him David Moyes was unable to get a deal for him over the line when the defender was at Sheffield United.

Manchester United are strongly linked with a transfer for Harry Maguire

Before all these United manager's had an opinion on Maguire, though, Sir Alex Ferguson had his eye on the centre-back.

Ferguson's opinion on Maguire

Back in 2013 Ferguson decided it was time to step down as Red Devils boss.

He instructed the club to hire Moyes as his replacement, and even gave his compatriot some advice ahead of the transfer window opening.

One of the players he suggested Moyes take a look at was Maguire.

Ferguson had seen the centre-back in action in the FA Youth Cup final of 2011.

Maguire did his best against the likes of Paul Pogba and Jesse Lingard on the day but his Sheffield United side were beaten by United.

Maguire started his career at Sheffield United

Worst of all for the centre-back though was the fact he suffered a concussion during the game and spent the night in hospital.

His evening would improve though when Manchester United sent him a home shirt as a gesture of good will and his phone rang.

On the other end of the call was Ferguson, who spoke to Maguire and told him that if he kept his head down and worked hard he'd be a world-beater one day, according to Andy Mitten, who retold the story to UniBet.

Maguire took Ferguson's advice on board and knuckled down.

The Scot continued to keep track of the centre-back's progression and decided that he was right for United at the time of his retirement.

Sir Alex Ferguson is a big fan of Maguire

As aforementioned, he brought Moyes' attention to Maguire, who considered him possible competition for Chris Smalling and Phil Jones.

United were in need of a new centre-back at the time as Rio Ferdinand and Nemanja Vidic were also on their way out.

Maguire would have cost the Red Devils just £4million back then, but for whatever reason the Old Trafford club opted against making a bid for him.

Maguire spent three seasons at Hull

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The defender would later secure a move to Hull City. He spent one season in three on loan at Wigan while on the Tigers' books before joining Leicester City.

Should Maguire complete an £80million transfer to Manchester United this summer he will become the most expensive defender of all time.