John Stones scrambled home an equaliser seconds from time amid chaos and controversy to deny Arsenal a famous victory against Manchester City at Etihad Stadium.

Arsenal had mounted a magnificent rearguard action following the first half-dismissal of Leandro Trossard - and stood moments away from arguably the finest moment in manager Mikel Arteta's reign - until substitute Stones forced in following a well-worked short corner at the end of seven minutes of added time.