UFC fans across the world have urged Conor McGregor to call it a day after watching his latest training footage.

The promotion's first simultaneous two-weight world champion hasn't set foot inside the octagon since breaking his left leg over FOUR YEARS ago.

McGregor , 37, took a giant step towards returning to the cage last month by re-entering and submitting a sample to the UFC's drug testing pool .

The Irishman has seemingly been ramping up his training over the last few weeks, which he's been sharing with his millions of followers on social media.

But many have been left unimpressed by what they've seen and have called for the future Hall of Famer to call it quits.

Commenting on a video of McGregor looking laboured and somewhat stiff as he hit pads, one fan said: "Bro looks

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