The Gunners are believed to be close to agreeing a deal for the teenage midfielder, but his current manager feels he must develop.
Arsenal are believed to be on the verge of signing Polish midfielder Krystian Bielik, but Henning Berg has told talkSPORT that the 17-year-old is not yet ready for Premier League football.
The former Manchester United and Blackburn Rovers manager is the teenager’s current manager at Legia Warsaw, with the player said to be set for a medical in London today.
Despite the youngster’s promise, Berg has stated that although Bielik is a real talent, he has a lot of growing up still to do.
“Being 17 this month he is nowhere near the finished article yet," Berg told talkSPORT.
"He has a lot of things to learn and to improve and I really do hope that Arsenal, if they sign him then they really look after him, coach him and make sure he gets the best out of his potential.
“He can handle himself on the pitch. For his age he is a physical player but he has good skills and ball control.
“But you’ve got to give him time because to play for Arsenal in the Premier League is a big, big step up."
The Norwegian continued by stating that he expected Bielik to play in the Emirates Stadium outfit’s youth ranks or reserve side, as he is not yet ready to represent the first team.
“He needs time to settle, adjust and develop and if he gets to train with the first team then fantastic, but to get Premier League matches will be a little bit too early for him,” Berg continued.
“He has only been with the first team for six months so would have continued to develop here and got better and better. I was hoping he would stay but I can understand why he wants to go.”
The defensive midfielder has been lauded for his ability on the ball since making his debut for the Polish side last year and has also represented his country at under-16 level.
Arsenal have an excellent track record of signing young raw talents and turning them into top players, but Berg’s comments suggest that Bielik will not be playing in the first team for some considerable time.