Six players have withdrawn from the Scotland squad to face Croatia in a World Cup qualifier on Friday.

Full-backs Lee Wallace and Danny Fox have been forced to pull out, while the defence has also been weakened by the loss of Gary Caldwell.

Celtic duo Scott Brown and James Forrest are also struggling in terms of fitness and will not make the trip to Zagreb.

Brighton midfielder Liam Bridcutt completes the call-offs ahead of the match, as the Scots seek their first win of the campaign.

Drafted into the squad are Motherwell full-back Steven Hammell and Aston Villa's Barry Bannan.

Scotland coach Stuart McCall eased fears over Grant Hanley and Gordon Greer joining the casualty list.

He said: "Grant just rolled his ankle early on in training today.

"It was just a precaution that he came off and got ice but he won't be a problem.

"Gordon Greer is coming up. He has had a little bit of tonsillitis but he will join up with the squad, as will Alan Hutton tonight as he played the other night."

McCall is well aware of the size of task facing an inexperienced squad against a team sitting joint top of the group.

But he is hopeful the Scots can give a good account of themselves in Zagreb.

He added: "Everyone is looking fine and raring to go.

"We are just trying to formulate a system and a shape that will suit the players that we've got.

"We are under no illusions that Croatia is a difficult place to go.

"But we've got to go there with a game plan, where we can be difficult to play against."

With Brown and Caldwell now absent and Darren Fletcher and Kenny Miller also missing from the squad, a decision has yet to be made on who will wear the captain's armband on Friday.