Arsenal have confirmed the signing of midfielder Krystian Bielik from Legia Warsaw.

The 17-year-old Pole has joined the Gunners for an undisclosed fee, "subject to the completion of regulatory processes".

Bielik, who can play both in defence and midfield, made his senior debut for Warsaw back in August.

Arsenal are currently in fifth place in the Premier League table, one point adrift of the Champions League positions.

They return to action on Sunday when they travel to Brighton & Hove Albion in the fourth round of the FA Cup.