Saliba was initially booked for bringing down Evanilson just beyond the halfway line but his yellow was upgraded to a red for denying a clear goalscoring opportunity.
Saliba is now set to miss Sunday's showdown with Liverpool and Arteta provided an update on whether the Gunners will appeal the decision in his press conference on Monday.
Mikel Merino has compared Arsenal's giant stars to a 'basketball team' and backs his team to continue utilising their advantage - particularly on set-pieces in future contests.
Arsenal's chances of winning the Premier League have been recalculated after a shock weekend defeat against Bournemouth handed Man City and Liverpool the advantage.
Liverpool manager Arne Slot has confirmed that forward Diogo Jota is unlikely to be available for this week's Champions League meeting with RB Leipzig in Germany.
Manchester United striker Rasmus Hojlund has revealed that club legend and assistant coach Ruud van Nistelrooy is having a positive impact on the whole squad ...