Arsenal are six points clear of Manchester City following the latest round of Premier League fixtures - but they have now dropped points for the second time in as many weeks.
Seven days on from their shock defeat at Everton, Mikel Arteta's side surrendered a one goal lead against Brentford, who battled back to pinch a share of the spoils at the Emirates Stadium.
Arsenal will meet Manchester City for the first time in the league this season in midweek with a healthy advantage still in tact. But they know that lead could evaporate if the reigning champions can defeat Aston Villa on Sunday and the Gunners in midweek.