'Welcome back champ': World reacts to 'greatest entertainer ever' Conor McGregor

It took Conor McGregor just 40 seconds to mark his return to the octagon with an emphatic TKO victory over Donald Cerrone and the fashion in which he did it stunned the world.

The Irishman took out “Cowboy” Cerrone at UFC 246 at T-Mobile Arena in Las Vegas in just 40 seconds, marking his first victory since 2016.

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McGregor laid waste to Cerrone in 40 seconds, delighting the standing-room only crowd with a brilliant performance.

Conor McGregor prepares for his welterweight bout against Donald Cerrone during UFC246 at T-Mobile Arena on January 18, 2020 in Las Vegas, Nevada. (Photo by Steve Marcus/Getty Images)

Naturally, fans took to social media almost instantly after the bout was decided.

Most were simply blown away by how quick it had ended.

LeBron James immediately lead the applause and welcomed back ‘The king’.

McGregor calls out opponents

McGregor returned to the octagon after nearly 15 months out and stunned the UFC knocking out Donald Cerrone inside one minute.

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McGregor dismantled Cerrone from the opening bell as he hit ‘Cowboy’ with a shoulder in the clinch, which busted his nose.

“I’ve never seen anything like that,” Cerrone said post fight.

The Irishman then traded kicks with Cerrone and knocked him down with a head kick before finishing him off on the floor.

“They can give fighters made up belts, but they can’t give fighters knockouts across three weight divisions,” McGregor said jubilantly.