According to reports, Manchester United has already made contact with AIK to express their interest in Filling. They plan to sign him and then loan him to their partner club, Lausanne in Switzerland.
Tottenham Hotspur is also interested in Filling, especially after the success of Lucas Bergvall, who joined from Djurgardens. Bergvall's move has been a positive one for the team, and they may be looking to replicate that success with Filling.