Naomi Campbell, Anna Wintour Blast Each Other Onstage at Fashion Event

9:26 AM PT — Naomi Campbell was not late to Tuesday evening’s Harlem’s Fashion Row Fashion Show and Style Awards, despite Anna Wintour‘s dig … TMZ has learned.

Sources close to Naomi tell TMZ … the supermodel arrived at the time she was instructed to by the event’s producers. We’re told it was Anna who moved up the presentation slot … since the Vogue editor wanted to make her way to the US Open.

AW did end up at the tennis tournament … and was photographed having a nice time with the other attendees.

Naomi didn’t know why Anna left early … but we’re told the model clocked the fashion guru’s exit and was disappointed by it — prompting her to make her own shady remark onstage.

NC wasn’t just pissed about Anna snubbing her … she was also upset about the designers who were putting on a show that night and wouldn’t get to impress AW.

Naomi Campbell and Anna Wintour got into a catfight of sorts during an NYC fashion show … with the two legends dissing each other onstage in front of a packed audience.

It was the supermodel versus the Vogue editor at Tuesday night’s Harlem’s Fashion Row Fashion Show and Style Awards — and it all started with Anna stepping up to the podium onstage to needle Naomi for being tardy to the party.

Anna told the crowd, “I am a very punctual person, and I have the honor of presenting tonight to someone who is often late.” Of course, Anna was referring to Naomi … and Wintour got so fed up with the lack of punctuality she eventually left.

Her exit prompted Samira Nasr — Harper’s Bazaar editor-in-chief — to present the Fashion Icon Award to Naomi, who took to the stage to accept the statue.

Naomi first admitted she’s always late … but said things always work out the way they’re supposed to.

Then Naomi took a dig at Anna — explaining she preferred having Nasr present her with the award instead of Wintour.

Naomi said … “It wasn’t my choice to have the other lady [Wintour]. I’d much rather have this” — meaning Nasr.

Many people in the room seemed stunned and let out audible gasps.

For now, it seems Anna and Naomi won’t be on each other’s Christmas lists.