The 17-year-old moved to North London from Legia Warsaw last week, and on the club’s official team page the teenager has now been included alongside his new teammates.
Bielik is predominantly a defensive midfielder although he can also operate as more of a central midfielder if required.
Having only made six senior appearances for Legia prior to his exit, it remains to be seen how many matches he will play for Arsenal this season, but he is a highly-rated young player who could go on to have a huge career if he continues on his current trajectory.
A quick look at Arsenal’s squad list shows that there are still some lower numbers available, including the number 5 which could be taken by an impending defensive arrival. But it will be interesting to see just how many new faces there are at the Emirates Stadium this month, should Gabriel Paulista sign as has been widely reported.