Arsenal won nine and lost none of their first 13 Premier League home games against Chelsea but have won just two and lost four of the last eight.
Chelsea have won eight and lost just two of the last 11 meetings with Arsenal in all competitions.
Jose Mourinho has never lost against Arsene Wenger as an opposition manager (W5 D4 L0).
Juan Mata has scored in each of his four starts against Arsenal in all competitions for Chelsea.
Chelsea have taken 11 points away from the Emirates Stadium, the joint-best haul of any team in the Premier League since the Gunners moved from Highbury (along with Aston Villa).
Theo Walcott scored his first ever Arsenal goal against Chelsea in the 2007 Carling Cup final and has since netted in three Premier League games against the Blues.
Chelsea have had 11 different managers since Arsene Wenger was appointed and 12 in total with Mourinho’s second spell. Jose Mourinho will be the fifth different manager Arsene Wenger has faced in the last six Chelsea v Arsenal fixtures.
Arsenal have not gone three Premier League fixtures without a win since January 2013; the third of those games was against Chelsea.
The Gunners have conceded as many goals in their last two Premier League games (7) as they had in the previous 13.
Chelsea have scored at least twice in each of their last six Premier League games (16 goals in total).