CARLTON faces the possibility of going into next week's elimination final without important ruckman Matthew Kreuzer after he sustained a mystery foot injury in Saturday night's 20-point loss to St Kilda.

Kreuzer, 22, was subbed out of the game in the second quarter after reporting numbness in his left foot and was sent to hospital for scans to determine the exact nature and severity of the injury.

"His foot went to sleep," coach Brett Ratten explained after the match.

"He couldn't feel his foot, so they tried re-strapping. I didn't know too much about it, but it happened in the warm-up so we re-strapped it and he started playing then we re-strapped his knee again just to see if there was anything involved there … his ankle too.

"Two minutes into the game the doc was saying, 'We've got a few issues with Kreuz'.

"We rushed him off to hospital to make enquiries to find out why so we don't know yet.

"He didn't train yesterday, he was just in sandshoes and took it easy in the last session. He had a few kicks and marks and those type of things. He came here and nothing was there and next minute 'bang'."

Ratten is hopeful of learning the extent of any damage by Sunday afternoon.

Kreuzer's injury came on the back of the late withdrawals of Michael Jamison and Andrew Carrazzo from the team that faced the Saints at the MCG.

Jamison reported some soreness in his left knee, which required surgery to repair ligament damage suffered in round 14, after his second game back from the injury layoff last weekend.

Carrazzo was involved in a minor traffic collision on Friday and woke up on the day of the game with a sore neck. Both players are expected to be available next week.

The loss of Kreuzer didn't help a misfiring forward line that was a key contributor to the loss to the Saints with the club's three leading goalkickers for the season - Andrew Walker, Eddie Betts and Jeff Garlett - failing to kick a goal.

Although clearly not the ideal preparation for next weekend's elimination final against Essendon, Ratten saw nothing in the Blues' performance that could not be fixed during the week.

"There was a lot to like," he said.

"I thought we got beaten at the stoppages, which is a strength of ours, so we'll have to address that area of the game.

"As a football club we've been crying out for over 10 years to play a home final to give our supporters the chance to be a part of our finals campaign.

"Essendon are going to be tough, but we'll have a great chance next week."