The rapper insisted that he looks nothing like the singer after viewers of the ITV1 show noticed a resemblance.
"I've not caught X Factor but I'm getting quite tired of this James Arthur stuff. If I see him and we look nothing alike you can all burn," he tweeted.
After being shown a picture of Arthur, he added: "You can all f**k off and die slowly the yout does not look like me."
Arthur replied: "Sorry man your much better looking I think some people need there eyes testin ha (sic)."
Green responded: "Lol mate if you saw my Twitter feed - I thought I had a twin! Must be the tatts."
Professor Green recently called X Factor creator Simon Cowell a "genius".
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