Aston Villa manager Unai Emery has spoken highly of Moussa Diaby ahead of the Villans’ upcoming Premier League fixture. The Villa boss, speaking to Birmingham Live, says he’s happy with the 24-year-old, whose “commitment is high and his behaviour is fantastic.” Emery also says he has spoken to Diaby about his downturn in form over the past few months, saying he’s still in the process of fully adapting to the Premier League. Diaby joined Villa to much fanfare from Bayer Leverkusen last summer. He hit the ground running, with six goal contributions from his first seven Premier League games. Howe…