Stuart McInally has emerged as an injury doubt for Scotland’s summer tour after suffering a calf injury.

The stand-in skipper suffered the injury on the eve of the team’s departure to Vancouver and will continue to be assessed by the medical staff.

Although McInally remains with the squad, uncapped Grant Stewart has been called into the touring party as cover for the three Tests which sees Gregor Townsend’s side take on Canada, the United States and Argentina, starting on Saturday 9 June.

Stewart, who is contracted to Glasgow and has made seven appearances for the Warriors this season, has progressed through the age groups of Scottish rugby and is currently in the BT Sport Academy, but he will compete with Fraser Brown and George Turner for a Test place should McInally fail to prove his fitness.

McInally’s injury would be a further blow to the Dark Blues who are already without regular skipper John Barclay, who suffered a long-term Achilles injury in the Guinness PRO14 semi-final win over Glasgow, while Greig Laidlaw has also been rested.

The Edinburgh hooker has emerged as a key player for Scotland since breaking into the side at the start of last autumn, was a regular in the NatWest 6 Nations and has previously skippered his club, but was due to captain his country for the first time.