Arsenal manager Arsene Wenger says a fee, reported to be around £2.4m, has been agreed to sign Legia Warsaw teenage midfielder Krystian Bielik.

The 17-year-old will have a medical at the club on Friday.

Bielik, who has played for his country's Under-16s side, signed for Legia from their Polish rivals Lech Poznan last July.

He has made six appearances in all competitions and will give Wenger further options in midfield.