He grew up as an Arsenal fan
Cozier-Duberry was born in London and he was a Gunners supporter from an early age.
The winger joined Sunday League side Chettle Court Rangers FC, who he played for from the Under 11s through to the Under 15s.
During that period, he did have plenty of trials at other teams around London but he did not get picked up by a club.
All that changed, though, after Arsenal took him on for a ten-week trial period to see what he could do.