Piero Hincapié aimed a pointed taunt at Virgil van Dijk after Arsenal beat Liverpool on Sunday.
Kai Havertz's goal settled the Premier League encounter in the favour of the reigning champions and restored them to the top of the table.
Liverpool, and Van Dijk, were left frustrated by the referee ignoring a penalty appeal when Alexander Isak's shirt was grabbed by Jurriën Timber.
After the game, Hincapie posted a close-up picture of the golden emblem on his shirt sleeve that denotes Arsenal as Premier League champions.
"I don't forget," was the accompanying caption.
Van Dijk had posted a similar picture of the champions emblem on his sleeve after Liverpool drew 0-0 against Arsenal at the Emirates in January.
Arsenal are nine points clear of Liverpool, who are fifth, as they seek a second title in consecutive years.
Van Dijk and Andoni Iraola were left to bemoan Liverpool's failed penalty appeal for the incident between Isak and Timber.
Van Dijk questioned: "Why does he have to complain when there are so many cameras?"
- Alexis Mac Allister 'embarrassing' for Noni Madueke clash - Jamie Carragher
- Andoni Iraola: I will 'definitely' tell Alexander Isak to go down in future after Arsenal penalty controversy
- Arsenal hold on for a big win at Liverpool, one Iraola & Co. can learn from
Iraola said: "Next time, the managers should tell Alex to go to the floor, otherwise they won't call it."
Arsenal and Liverpool will turn their attention to Champions League matches this week. Arsenal play at Slavia Prague while Liverpool are away at Fenerbahce.