Arsenal have lost three games this season, and there is one thing in common with all those defeats.
Shkodran Mustafi was not at the club when Liverpool beat the Gunners on the first day of the Premier League season, and he sat out of their EFL Cup quarter-final loss to Southampton as Arsene Wenger named a much-changed side.
The German World Cup winner was then forced to sit on the sidelines on Tuesday evening, with injury keeping him out of the Goodison Park clash against Everton - which started brightly but then turned into that third defeat of the campaign.