Scotland boss Steve Clarke says he is "100 per cent worried" about Billy Gilmour after the midfielder hobbled off injured against Curacao on the eve of the World Cup.
The 24-year-old fell to the turf with no one around him in the first half of Scotland's 4-1 win over Dick Advocaat's side at Hampden and was immediately substituted.
Clarke revealed Gilmour had gone for a scan to assess what damage had been done, but admitted he is concerned about the Napoli player's availability for the World Cup, with Scotland's first game against Haiti in Boston a little over two weeks away.
"One big disappointment is the injury to Billy and we are just waiting on it being assessed and we'll find out how bad it is," Clarke said after the game.
"He has gone for a scan so I haven't had a chance to speak to him, but I am 100 per cent worried.
"He hurt himself in the tackle then made the decision to take himself off - he knew it wasn't right. There's no point speculating, let's wait and see what the medics say.
"I'm sitting here hoping and praying he's on the plane."
Gilmour's replacement in the game, Findlay Curtis, got his first senior international goal to bring Scotland level after they fell behind against Curacao, with a Lawrence Shankland double and Ryan Christie penalty sealing the win before the squad flies out to America.
'Red card changed the dynamic of the game'
Scotland struggled against Curacao in the early stages and found themselves 1-0 down after Tahith Chong's goal but a red card for Jurgen Locadia seven minutes before the interval swung the game back in Scotland's favour, even if Clarke would rather that both sides kept a full complement on the pitch.
"The red card obviously changes the whole dynamic of the game and from there, at least, against the 10 we managed to start creating chances and got a few goals," he said.
"It is obviously nice to win any international game, but I think it would have been better if it stayed 11 vs 11 and then we'd have been asked more questions about finding the spaces on the pitch - could we create the chances that we created against 10 men against 11? That would have been a better exercise for us."
