Mikel Arteta called upon three Arsenal outsiders to step up behind the scenes during a crucial period in the season. Mikel Arteta has generally been very reliant upon a trusted core of Arsenal players this season. The Spanish coach has not regularly rotated his preferred starting XI this season, especially when not forced to by suspensions or injuries. For instance, William Saliba made Arsenal history on Sunday as he became the first outfield player to play every minute of a Premier League season for the club. On top of that, Ben White, Gabriel Magalhaes, Martin Odegaard, Kai Havertz, Declan R…