CARLTON has suffered another blow its key forward stocks with leading goalkicker Harry McKay struggling with a groin problem.

After ending the season with groin soreness, McKay will remain on a modified training program until Christmas.

The news comes a day after the Blues revealed Charlie Curnow will need knee surgery after a freak accident.

"We gave Harry a short period of rest and his groins settled down really well. As we built him up slowly, his groins got a little bit sore," director of high performance Andrew Russell said.

"We've had to pull him back a little bit and re-strengthen that area.

"We'll progress him back into ball work in the new year."

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Curnow underwent surgery on Wednesday to repair the fractured patella in his right knee.

"It’s a new injury: it’s not exactly the same as the one he had," Russell said.

"We’re really confident that Charlie is going to be back and in good shape.

"The program that we put in place will be a really solid and robust program so that when you see him again, he’s going to be moving extremely well."

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