Head-to-head
... Chelsea's 4-1 win at the Emirates in May 2009 was Arsenal's worst home defeat in Premier League history and their worst home league defeat since 5 March 1977 when they lost 4-1 at home to Ipswich Town.
... The Gunners have only managed two wins from their last 14 competitive matches against Chelsea.
... Didier Drogba has scored eight goals in his last eight appearances in all competitions against Arsenal.
... Arsenal are aiming for a seventh successive league win at the Emirates, and a 13th in all competitions. The last team to win at Arsenal were Chelsea.
... The Gunners have lost only one of their last 10 Premier League London derbies.
... But they have not won a league game against a fellow 'Big Four' club in the last five attempts.
... Arsenal have the strongest attack in the Premier League (36 goals in 12 games) and have scored 12 in their last three league games at the Emirates.
Chelsea
... Chelsea are bidding for a fifth successive league win.
... They have got the meanest defence in the division with eight goals conceded in 13 games. They have gone four games in the Premier League without conceding a league goal.
... The Blues have won their last five Premier League London derbies, and their last three against 'Big Four' opposition.
