Robbie Neilson has this morning revealed that Neil Alexander faces a month out on the sidelines.
The Hearts No. 1 was stretchered off during Sunday's fantastic 2-1 win over Rangers at Ibrox, after colliding with team-mate Alim Ozturk at a set-piece.
Following a trip to hospital, it was confirmed that the shot-stopper has suffered a serious facial injury which will see him out until next month.
Speaking exclusively to Hearts News, head coach Robbie said: "Neil took a bad one. He's got a fractured cheekbone so he'll be out for around four weeks.
"It's not great but we've got a squad and I thought that Scott Gallacher came on yesterday and did very well. He's a good 'keeper and that's the reason that we brought him in.
"I'm really disappointed for Neil but he's had a fantastic game for us. He's a leader about the place as well."
Meanwhile, Soufian El Hassnaoui has stepped up his rehabilitation and could be involved in first-team matters over the coming weeks as Callum Paterson continues his return from injury.
"We've still got a couple of injuries but Soufian trained over the weekend for the first time," Robbie said. "He'll join the squad in the middle of next week.
"Callum has his knee problem but that should be another three or four weeks hopefully before he's back training with the group."