Celtic fell to a 2-0 defeat at Bower Fold against a strong Oldham side with a goal in both halves sealing victory for The Latics.
Oldham took the lead on 29 minutes through Trialist â€˜Eâ€™ after he was able to latch onto a ball over the top of the defence. He impressively played the ball over Grant Shenton and into the empty net.
Just before the hour mark, Celticâ€™s Trialist No.2 made a superb piece of last-ditch defending to nick the ball off Keillor-Dunn who was through on goal.
â€¨Celtic had a great chance of their own moments later, a corner was headed back across goal to Luke Barlow however he couldnâ€™t quite connect with the ball and his strike fell wide of the far post.
Oldham scored a second on 63 minutes through Trialist â€˜Hâ€™.
Callum Whelan played a lovely through ball into the path of â€˜Hâ€™ and he fired low past Shenton to score Oldhamâ€™s second.
Celticâ€™s Trialist No.18 took aim from a free-kick 25 yards out and forced a stunning save from Latics keeper to prevent a goal.
Shenton was called into action three minutes from time, making a superb finger tip save to deny Trialist H.
Oldham left Bower Fold victorious in what was a good test for some of Celticâ€™s youngsters, with academy players Matthew Jones and Noah Inneh both featuring.
Celtic return to action this Saturday away at Macclesfield FC (15:00).