Michael Stewart feels Yosuke Ideguchi was lucky to avoid a broken leg as he branded Mouhamed Niang's tackle indefensible.
The Alloa man caught the Celtic midfielder high with a raised boot in the second half of their Scottish Cup tie, forcing the Japanese international off with an injury.
Manager Ange Postecoglou offered hope after the match that his new signing won't face too long on the sidelines as he refused to be drawn on whether a red card should have been shown.
