Celtic boss Gordon Strachan expects injured trio Stephen McManus, Gary Caldwell and Lee Naylor to all play through the pain barrier against Manchester United.
The defensive trio are all struggling with injuries ahead of Wednesday's UEFA Champions League clash at Old Trafford.
McManus is suffering with a calf complaint, Caldwell is struggling with a heel injury and Naylor picked up an ankle problem in last weekend's win at Aberdeen.
Strachan expects all three players to be fit for the clash with United as they are strong mentally to cope with the injuries.
"Our centre backs played on Saturday with knocks," said Strachan.
"You talk about experience and they might not have that but they have big hearts and they are physically and mentally strong.
"They showed that on Saturday. I have to remind people that on Saturday we had 13 attempts on goal and Aberdeen had none whatsoever.
"So the back four did very well against Aberdeen but this is a different challenge.
"Lee Naylor has got a wee bit of a knock as well so they are being protected in training. We are short in that department.
"They showed that with injuries they could keep their concentration.
"They aggravated them during the game on Saturday.
"There is no doubt they will be feeling a wee bit of pain but the excitement and the adrenalin will hopefully nullify the pain."