Maupay was up to his usual s***housing against Tottenham, but it spectacularly backfired in a 3-2 defeat.
Scoring the opener in the 15th minute, the Frenchman ripped off Maddison's dart-throwing celebration in front of the crowd.
That would have been enough of a storyline with Spurs coming back and leaving Maupay red-faced, but Maddison made sure to add some extra spice.
Grabbing the striker after his celebration, things got heated as hands were put round necks and yellow cards were narrowly avoided.
Maddison very much had the last laugh, and made the most of it in front of his 1.9million Instagram followers, posting Maupay's celebration, then himself celebrating, then the final score below eventual match-winner in Richarlison.
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To further rub salt in Maupay's wounds, Maddison had some all-star backing, with Jude Bellingham and darts sensation Luke Littler both commenting on the post.
Alongside a dart in a dart board emoji, Littler said: "Yes sirrrr."
Meanwhile, Bellingham merely commented the grimacing emoji.
Not to forfeit the last word, Maupay couldn't help himself but post another photo of himself celebrating 20 minutes later, but with an extra dig at Maddison.
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"Went a bit early with that one," he wrote.
"Gutted we couldn't get the win. More goals and less relegations in my career than James Maddison. We go again Monday bees."
He then commented on Maddison's post, writing: "Ahaha rent free."
England international had Maddison had earlier explained his heated tangle with Maupay, telling TNT Sports: "I told him he hasn't scored enough goals to have his own celebration so he had to copy mine... a short story, it ended well for us though."
Judging by the aftermath, it won't be too short a story, and given Maupay's history, it will likely rumble on next time the two sides meet…