In a brief substitute appearance for the Development side last season he scored in a 2 - 0 win over Kilmarnock .
Johnston was a late substitute for the Celtic u-19 side in their 3 - 0 UEFA Youth League win over the Puskas Academy .
In a brief substitute appearance for the Development side last season Johnston scored in a 2 - 0 win over Kilmarnock .
Johnston was a late substitute for the Celtic u-19 side in their 3 - 0 UEFA Youth League win over the Puskas Academy .