Ghanaian right-back Jeremie Frimpong has handed Celtic a huge fitness boost after reportedly taking a big step in his recovery by running on grass.
Frimpong was stretched off in their 3-1 away win against Kilmarnick due to a knee injury following a challenge from Alan Power.
Despite returning on the training ground, the defender is still understood to be undergoing his rehab.
The 19-year-old, who was not expected to come anywhere near the Hoops first team upon joining the club has managed to get ahead of experienced teammates like Hatem Elhamed and Moritz Bauer, in the Celtic right back pecking order.
He was included in the Europa League squad for the last-32 tie against Copenhagen after a stunning breakthrough in the first half of the campaign.
His return will be a welcome boost for the Hoops, who get their Europa League tie underway next Thursday when they travel to Denmark for the first leg against Copenhagen.