Former Newcastle United striker Demba Ba led his Istanbul Basaksehir team off the pitch in their Champions League clash with Paris Saint-Germain.
Basaksehir's assistant coach Pierre Webo was the victim of racist language from the fourth official, according to Get French Football News.
Following the incident, Ba led his team-mates to refuse to continue play, and likewise, the PSG players followed suit and also walked off the pitch.
As reported by The Guardian, a clip of the former Magpies striker shows him confronting the Romanian fourth official, Sebastian Coltescu, saying: "You never say 'this white guy', you say: 'these guys'.
"So, listen to me, why when you mention a black guy, do you have to say 'this black guy'?"
PSG's sporting director Leonardo ended up on the pitch having a word with the officials - with the incident almost definitely the subject of conversation.
The heated debate on the touchline happened after around 15 minutes of action - where the game was goalless at the Parc des Princes, in an important game in Group H.
Then the Istanbul players walked off the pitch at around 22 minutes, about eight minutes after Webo was shown a red card after an altercation with the fourth official.
The Turkish side took to their official Twitter account to share their view on the matter, simply saying: "NO TO RACISM".
Turkish news outlet TRT Spor are reporting that the Super Lig side won't return to the pitch unless the fourth official is replaced.
It is still not known when - or if - the play in the French capital will return and whether Ba's side go back on the pitch.