Hamilton skipper Michael Devlin will miss both legs of the Ladbrokes Premiership play-off against Dundee United.
The 23-year-old defender had to come off in the first half of Saturday’s 4-0 win over Dundee at the SuperSeal Stadium with a knee injury.
Devlin’s injury came about following an innocuous tussle with Dee forward Marcus Haber. The pair were running for a loose ball when the Hamilton man went down clutching his knee.
Accies travel to Tannadice on Thursday night before the return leg in Lanarkshire on Sunday for which Devlin would have been suspended.
Boss Martin Canning said: “He had a scan yesterday and we will need to wait and see.
“Hopefully we will get something back today, if not tomorrow, and we will know exactly what’s wrong.
“He will be out for Thursday, he has been hobbling about on crutches.
“He was out for Sunday, he was suspended and was going to miss it regardless.
“It is a blow because he has been great for us all season.”
Canning explained the news could be offset by the return from injury of Greek defender Georgios Sarris.
The Hamilton boss added: “Hopefully we can get Georgios Sarris back for Thursday so it will be like-for-like.”
Canning is heartened to go into the first game on the back of a convincing home win over the Dark Blues.
However, he acknowledged that Dundee were already safe before they travelled down from the City of Discovery.
He said: “I don’t think Dundee played the way they would have if the game meant as much to them, in terms of they couldn’t go down.
“I don’t think they didn’t play well, I don’t think they were as bang at it as they normally would be and United will be.
“We have to be careful not to fall into the trap of ‘we have beat Dundee comfortably, the game has gone great’.
“It isn’t going to be the same on Thursday. It can be if we go and play as well as we have but we need to make sure we win the battles first.
“The pressure on both teams is equal, we need to make sure it means more to us than it does to them, give it everything over two games and hopefully get the job done.”