Kilmarnock goalkeeper Cammy Bell will miss up to ten weeks of the season with a broken bone in his hand.
The 25-year-old was
hurt making a late save from Fraser Kerr
during Saturday's 2-1 defeat to Motherwell.
"It will give the some of the other kids a chance to come in and do well," manager Kenny Shiels told BBC Scotland.
"We have to be positive and we have Kyle Letheren and Anssi Jaakkola who are both more than capable. We'll replace him. It's a simple as that."
Bell has been at Rugby Park since 2003 and has been capped once for Scotland, making an appearance as a substitute in a friendly win over Faroe Islands in November 2010.
"I'm disappointed for Cammy because he would have been looking at a call-up for Scotland, with Allan McGregor injured," added Shiels.
"He hasn't had much luck on the international front."
On the issue of who will play against Dundee United on Saturday, Shiels added: "Anssi did really well in Under-20 game against Aberdeen today and Kyle has been doing well.
"I'll speak it over with [coach] Billy Thomson, who knows all about producing goalkeepers.
"We can't go in with any negative approaches. I don't see any problems.
"We've had three key players going in for operations in the last eight days; Paul Heffernan, Garry Hay and now Cammy. Sometimes you get periods like this, that's what squads are for."