St Johnstone defender Sam McClelland has picked up a training ground injury on Northern Ireland duty.
The young centre-back was ruled out of the under-21 clash with Serbia on Monday night and will now be assessed by the McDiarmid Park medical team.
Like his Perth team-mate, Dan Phillips, it is understood McClelland has sustained a high ankle sprain and is a major doubt for Saturday’s Premiership clash with Motherwell.
The former Chelsea player has featured seven times for Saints since signing a two-year deal in the summer.
Meanwhile, Max Kucheriavyi will return to Perth fully fit.
He was an unused substitute in Ukraine under-21s’ dramatic 3-2 victory over England, having come off the bench in last week’s European Championship qualifier against Luxembourg.
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