Conor McGregor's has finally been left at a loss for words.

The mural of McGregor knocking out Mayweather inside his gym has gone viral since it was unveiled on Instagram by 'The Notorious' a couple of weeks ago and now, thanks to video released by the artists behind the piece, we get to see how Conor reacted to seeing the stunning piece of art for the first time.

The mural was commissioned by McGregor's coach, John Kavanagh, and completed by a collective called 'SUBSET Dublin', who also earned plaudits for a Stormzy mural in Dublin earlier this year.

[embed]https://www.youtube.com/watch?v=p5qPJEmfTl4[/embed]

McGregor – who fights Floyd Mayweather on August 26th – has had a gym privately assembled in a mystery Dublin location so he can prepare for the fight of his life out of the spotlight.