Sunderland will open disciplinary proceedings against Republic of Ireland international Darron Gibson, the club have confirmed.
Gibson was filmed launching a verbal tirade on his teammates while seemingly drunk and bring confronted by Sunderland fans on Saturday night.
"Darren Gibson [sic] has not conducted himself in a manner befitting Sunderland Football Club," the club statement, released on Monday, reads. "As a consequence, we will initiate our internal disciplinary process to deal with the matter. Darron has apologised this morning."
In the video, Gibson is criticised for not caring himself after going out drinking following his side's 5-0 thrashing at the hands of Celtic in a preseason friendly at the Stadium of Light.
However, while claiming he does care about the club, he suggests that there are a number of his teammates who do not share that same level of commitment.
When pushed to name players, the 29-year-old asks the supporters who they think he means before appearing to agree that Lamine Kone, Jeremain Lens and Whabi Kazri are not trying as they want to leave the club.
Kone is the first name put to him, to which the Republic of Ireland international responds "right, there's one", before replying "next one" when Lens and Khazri are mentioned.
Gibson, who joined the Black Cats for £1m in January from Everton, then signs off by saying: "Right, I'm off my face in here, but I still want to play for Sunderland, the rest of them don't though…"
Liverpool manager Jurgen Klopp would not let the disappointment of missing out on top transfer target Naby Keita get him down following the victory over Hertha Berlin as he joked the club will launch a "€300m" bid to sign the RB Leipzig midfielder.