Rasmus Hojlund produced a savage response to Kyle Walker, who he said should win an Oscar after the Manchester City defender's play-acting in the derby.
Hojlund and Walker clashed just before half-time in Manchester United's 2-1 win over City with Walker falling to the ground in theatrical style as the pair went head to head.
VAR checked the incident but no violent conduct was deemed as both players were yellow carded for the spat.
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Sky Sports' Roy Keane and Gary Neville deemed Walker's actions as "embarrassing" and Hojlund took to Instagram to post his comeback.
Along with the picture of the incident, Hojlund wrote: "Manchester is red; Violets are blue; What a brilliant performance; But the Oscar goes to…"
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Keane rages at Walker
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Keane on Walker Hojlund
Roy Keane was angered at Manchester City defender Kyle Walker after he took a tumble to the ground following a coming together with Manchester United's Rasmus Hojlund.
Sky Sports' Roy Keane:
"Walker must be embarrassed. To go down like that...
"Look at this. I don't know the guy and I am embarrassed for him."