Ryan Jack. With John McGinn always likely to burst forward and look to get involved in the attack it was up to that duo to keep Serbia's midfield at bay on Thursday night.They did so superbly, with their qualities complimenting each other perfectly.
Playing in a more defensive role than he does for Rangers, Jack won the ball back four times and won 75 per cent of his tackles.
He made just 44 passes - less than he managed in just one half against Hamilton in his previous game - while McGregor made 55 alongside him.
The Celtic man completed 89 per cent of his passes and made an incredible 17 interceptions. They'll be back to club rivalry soon enough, but McGregor and Jack's blossoming partnership bodes well for the tournament.
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