Grant waits on scan results
Ryan Grant's World Cup chances rest on the results of X-Rays on his injured right ankle.
Head coach Vern Cotter admitted Scotland must sweat on the results of Grant's medical assessments, in the wake of 28-22 defeat to Ireland in Dublin.
Glasgow prop Grant was carried off the Aviva Stadium pitch by stretcher on Saturday, and was sent immediately for extensive examination.
Scotland boss Cotter is keen to keep an open mind on Grant's prognosis, but the outlook seems bleak for the 29-year-old who could now well miss next month's World Cup.
"We don't know how he is yet: Ryan's had an X-Ray and we haven't had the results of that," said Cotter.
"We need to wait to be as accurate as we can on Ryan, and we can only wait and see at the moment."
Scotland pushed double RBS 6 Nations champions Ireland all the way in World Cup warm-up action, but were undone by late tries from Simon Zebo and Luke Fitzgerald.
Chris Henry and Sean Cronin also crossed for Ireland, with Ian Madigan landing four conversions in a solid showing at fly-half.
Blair Cowan, captain Henry Pyrgos and centre Peter Horne claimed Scotland's tries in an encouraging effort from Cotter's men, albeit in defeat.
The Scotland boss admitted his only major worries following his side's first World Cup warm-up clash were injuries to three of his squad.
Ireland will continue their World Cup preparations by taking on Italy in Turin next Saturday, with their battle in Pool B itself kicking off on Wednesday, September 23 against Japan at Kingsholm.
"I'm only really worried about injuries at this stage, obviously with Ryan, then Fraser Brown had a slight hamstring issue and Hugh Blake dislocated a finger," said Cotter.
"I think there were some good things and some things that we can work on.
"We definitely need to be more accurate at times, the intentions were good but we let Ireland score a couple of tries perhaps too easily.
"It's important to improve and that's what our focus is on now, just to improve on this game.
"David (Denton) I thought carried very well, and in Hugh Blake's first game he very active around the field.
"I think it's a good start, but we can get better and we must get better.
"I'm happy but I'm not finished.
"There may be changes in the loose-forwards next week to see what other players who are working very hard can do as well."