The WBC heavyweight champion was seen inspecting the pitch ahead of the FA Cup quarter-final between United and Liverpool.
But his bold outfit choice caught the attention of those on social media.
Fury looked to be embracing the St.Patrick’s day spirit as he wore a bright green tracksuit, which he matched with a pair of dark walking boots.
He wore a gilet puffer over the top alongside a Stetson hat.
In the video, he is seen emerging from the Old Trafford tunnel before holding his arms outstretched and saying “This is where it’s at!”
Fury is an outspoken Manchester United fan and is friends with both former Red Cristiano Ronaldo and goalkeeper Andre Onana.
Some fans were confused by Fury’s outfit and said as much on X.
One said: “What is he wearing?”
Another wrote: “Why is he dressed like a jolly green giant?”
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Others were simply stunned by the size of Fury.
One wrote: “Man is so tall next to security.”
Another said: “Looks like a giant next to the little security man !!😆”
United take on Liverpool today at 3:30pm with a place in the semi-finals at Wembley at stake.
Despite United’s poor form in the league this season, United managed to hold Liverpool to a 0-0 draw earlier this season – which will give the Old Trafford faithful some hope in the derby.