Manchester United defender Brandon Williams took aim at "fake" Rio Ferdinand after seeing Manchester City win the Treble.
Williams was reacting to taunts from City fans after United to losing their status as the only English club to achieve the feat.
He posted to Instagram: "Nobody wants a sloppy seconds", alongside three emojis of Red Devils.
"Wow you lot of the opps follow me. Enjoy (don't watch?)".
He then slammed Ferdinand for congratulating Ferdinand on the Treble.
Tagging the former United defender's account, the left-back wrote: "Bet you don't congratulate if you was player keeep [sic] the same morals."
With a yawning emoji, he he added 'too face [sic] are boring".
He then came back with: "You don't praise simple as", and, "fakesssssss" with two emojis representing money.