New signing Viliami Ma'afu helped Tonga to a 24-20 win over Japan in the Pacific Nations Cup but there will be some concern in the Glasgow camp as the back row man was helped off in the first half with an ankle injury.
DTH van der Merwe was in action for Canada as they edged out the USA 28-25 in Kingston.
David Lemi, who was with Glasgow on a short-term deal last season, scored two tries in Samoa's 29-26 won over Fiji.