iLOVEMAKONNEN was attacked on stage at a nightclub by a jealous fan while performing his hit single, 'Tuesday'—on a Tuesday.

In the beginning of the footage (above) you can see a man in a grey hoodie approaching the stage. It seems as if he is getting Makonnen's attention to shake his hand or give him props, but when the OVO rapper went to dap him up he was pulled to the ground and punched as the assailant quickly fled the area.

Makonnen's crew jumped into action and chased the man across the club while he played it off like a true champ as if nothing had even happened. No police were called and Makonnen wasn't seriously hurt.

after getting in several hard shots, the attacker actually managed to slip away -- but sources inside the club tell TMZ the owners know exactly who the guy is ... and describe him as a "jealous fan." We're told he's been banned for life.

And to think, it all went down—on a Tuesday.

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