Having arrived from Legia Warsaw as an imposing central midfielder, Krystian has since adapted to a new role at centre back during his time with the Gunners.
His commanding performances soon earned him his first-team debut, coming off the bench during the 3-0 defeat to Sheffield Wednesday in the League Cup in October 2015.
Krystian Bielik Profile
January 04, 1998 Konin, Poland
The teenager recorded the most appearances out of all the youth players last season, featuring 32 times for the under-21s, under-19s and under-18s combined. Captain of the FA Youth Cup side that reached the semi-finals, Krystian is also a Poland youth international.