More should unite Chelsea and Arsenal fans than divide them on Sunday at a London derby being played with discontent raging at both English Premier League clubs.
Boos echoed round Stamford Bridge on Wednesday as Chelsea threw away a two-goal lead to draw 2-2 with Southampton.
It was Chelsea's second setback of the day as long-term managerial target Pep Guardiola opted to join Bayern Munich for next season, removing one option as interim coach Rafa Benitez's replacement.
At least Chelsea remains on course to capture one of the four Champions League places next season as it sits third in the standings.
Arsenal, though, is sixth after taking just one point from its last two matches, and supporters are increasingly restless.
Also on Sunday, leader Manchester United take on Tottenham Hotspur.