Ten-man Arsenal crashed to a miserable fourth successive home Premier League defeat against Burnley as the pressure continues to mount on manager Mikel Arteta.
Captain Pierre-Emerick Aubameyang inadvertently headed into his own net from a corner at Emirates Stadium after Granit Xhaka had been shown a straight red card for violent conduct.
Xhaka grabbed Clarets midfielder Ashley Westwood by the throat during a second-half flashpoint.
It is the first time since 1959 that Arsenal have lost four in a row at home in the league and a seventh defeat of the season already leaves them 15th in the table after 12 matches.