What do Arsenal still need in the transfer window?

[BBC]The Premier League champions have already strengthened the middle of the pitch with Bruno Guimaraes, the wing with Christos Tzolis and their defence with Ezri Konsa.But Arsenal are still in the market for a forward and have a long-standing interest in Julian Alvarez.Although it appears to be a difficult deal due to many factors, the Gunners will be ready to act if there is a chance to get it done.Meanwhile, Gabriel Martinelli, who is in talks with Saudi side Al-Hilal, will be allowed to lea