Arsenal are facing several key injury doubts ahead of their crucial Premier League clash with Manchester City on Sunday. Bukayo Saka, Gabriel Magalhaes and Gabriel Martinelli all missed International duty with their respective nations over the break with injury issues, and it remains to be seen whether they will be able to start at the Etihad Stadium. Martinelli missed Arsenal’s victories over Brentford and Porto prior to the break, and this saw Arsenal’s free-scoring form slightly falter, having won 6-0 with him, then 2-1 and 1-0 without him in the last three games. Mikel Arteta has now revea…