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Celtic midfielder Nir Biton is facing a month on the sidelines with a groin problem.

The 22-year-old sustained the damage playing for Israel in last week's 2-1 friendly loss to Slovakia.

James Forrest, also 22, picked up a similar complaint while on international duty with Scotland.

The winger was hurt in training with Gordon Strachan's squad in Poland and is expected to miss two weeks of action in an injury-interrupted season.