Arsenal journalist James McNicholas has now been providing an injury update on a key player with the game against Manchester City in mind. Mikel Arteta faces a huge test when Arsenal welcome Porto to the Emirates for the second leg of their Champions League tie tonight. Although 1-0 down from the first leg, this Arsenal squad must be brimming with confidence given their scoring of late, and the likes of Kai Havertz and Bukayo Saka must be raring to go. Following tonight’s game Arsenal will then have a sizable break before they travel to the Etihad to face Man City on the 31st March. Perhaps th…