Ryan Jack insists Old Firm rivalries are always left at the Scotland door as it emerged that club football brought some disruption to the England camp.
Raheem Sterling will not be considered for the Three Lions' Euro 2020 qualifier against Montenegro tomorrow after an altercation with Liverpool defender Joe Gomez.
The pair clashed towards the end of Manchester City's 3-1 Anfield defeat to Liverpool on Sunday and were again involved in an exchange after meeting up for England duty on Monday.
Jack, the only Rangers player in Steve Clarke's squad for the final 2020 European Championship qualifying double-header against Cyprus and Kazakhstan, met up with Celtic's James Forrest, Callum McGregor, Greg Taylor and Ryan Christie, as well as the other Scotland players, at their hotel in Edinburgh.
The Glasgow giants are neck-and-neck in an increasingly tense Ladbrokes Premiership title battle but Jack insists the age-old rivalry is parked during international breaks.
The midfielder said: "It has to be (left at the door). There is no doubt that we all fight and battle on the pitch and we all want to win every game but when we turn up, we are team-mates and we train hard together and we play for each other.
"You play against players every week that you join up with on international duty. We turn up here, we are a team, we are together and we all want the same goal, which is to win these two games and hopefully get Scotland to a major tournament."
Asked if he had encountered anything similar in the Scotland squad, assistant coach Alex Dyer laughed: "We all love each other."