Some Manchester United supporters reading this might be too young to remember when Luke Chadwick briefly played for the Red Devils.
The former England Under-21 international made a handful of appearances for United - 38 in total - around the turn of the century but, ultimately, failed to make the grade at Old Trafford.
Chadwick went on to enjoy a decent career in the lower leagues but still has fond memories of his time at United. However, in an interview with fanzine Red News, the 35-year-old has revealed how tough it was training with Roy Keane.
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"He was one of those in training, if you were on his team and you weren't performing, he'd make your life a living hell," Chadwick said, per the Express. "It didn't matter who you were.
"You could be a young kid trying to work your way up or a world star, he'd tell you in no uncertain terms."
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Chadwick reveals Keane's softer side
But Keane wasn’t always ferocious. In fact, Chadwick has revealed that the former Manchester United captain had a much softer soft to his character.
"Off the field as a captain he was amazing, especially to us young lads," Chadwick added. "He'd look after us with contracts and things like that.
"He used to pick me up occasionally for training and take me home.
"He was a really great guy and I cannot thank him enough for everything he did for me."
United's senior pros were vital for success
It’s surely no coincidence that Manchester United were so successful during the 1990s and 2000s because they had exceptional first-team stars like Keane, Ryan Giggs, Paul Scholes, Gary Neville and others demanding 100 per cent from the team’s young stars in every single training session.
Nothing less would be tolerated from the senior pros; part of Sir Alex Ferguson’s job was done for him on the training ground.
United's current squad lacks leaders
How many of United’s current batch of senior stars are as demanding as Keane?
Wayne Rooney, as club captain, possibly comes remotely close - and that’s probably about it.
It’s widely accepted that younger players are more sensitive these days and the dressing downs that Keane and co. dished out during their heyday might not be deemed acceptable today.
However, without the influence of a group of senior pros in the dressing room - players that have seen it all before during their careers and been successful - United are struggling.
The team clearly lacks leadership and this is a problem that either Louis van Gaal or his successor must address this summer.
Which experienced player should Manchester United sign this summer? What about Zlatan Ibrahimovic? Have your say by leaving a comment below.