6-0 rout in dismal day for Wenger
Chelsea go on the rampage to spoil Arsenal manager's 1,000th game - and just to make it worse, the ref sends the wrong player off
Chelsea handed Arsene Wenger one of his most demoralising defeats as Arsenal manager as his 1,000th game ended in a 6-0 rout on Saturday, and the referee also endured embarrassment at Stamford Bridge.
Chelsea earned their biggest league victory under Jose Mourinho and was up 2-0 after just seven minutes through goals from Samuel Eto'o and Andre Schuerrle. Referee Andre Marriner then provided the London derby's big talking point by sending off the wrong Arsenal player after 15 minutes.
Although Alex Oxlade-Chamberlain blatantly handled to keep out Eden Hazard's shot, it was Kieran Gibbs who was dismissed despite Oxlade-Chamberlain admitting to the referee: "It was me."
Technology is only used in the Premier League to rule on disputed goals, but Chelsea manager Jose Mourinho called for referees to be allowed to base decisions on video replays.
"The sending off is a big ammunition for people like me that thinks that one little screen in front of the fourth official is a big help against these kinds of mistakes," Mourinho said.
Hazard scored Chelsea's third from the resulting penalty, before Oscar netted twice and Mohamed Salah completed Wenger's misery with his first goal for the leaders.
Manchester City's Yaya Toure scored a hat trick in a 5-0 victory over Fulham with Fernandinho and Martin Demichelis completing the scoring. City climbed above Arsenal into third place.
Second-place Liverpool won 6-3 at Cardiff with Luis Suarez scoring a hat trick.
Everton climbed to fifth with a 3-2 win over struggling Swansea City and Norwich City beat relegation rivals Sunderland 2-0.
West Bromwich Albion lost 2-0 to Hull City and Newcastle United, with a Papiss Cisse goal in stoppage time, accounted for Crystal Palace 1-0.
Arsenal saw their title ambitions seriously dented as they fell seven points behind Chelsea.
For Wenger the margin of defeat matched the previous low point of his 18-year reign - an 8-2 loss at Manchester United. And the humbling only served to justify Mourinho's recent gibe that Wenger is a "specialist in failure" as the Frenchman went an 11th game without beating his Portuguese rival.
"Two-nil after seven minutes and the game is over, because we were too strong for them," Mourinho said.
Early on, Schuerrle ran through the centre from the halfway line and passed to Eto'o on the edge of the penalty area, and the Cameroon striker controlled the ball before curling it past the diving Wojciech Szczesny in the fifth minute.
In a near replica move, Arsenal's defence crumbled again inside two minutes as the provider turned scorer. Nemanja Matic seized possession around the halfway line and fed Schuerrle, who went past Laurent Koscielny before scoring.
"Arsene Wenger we want you to stay," Chelsea fans taunted.
Then it got a lot worse for Wenger's side - and the referee - when Hazard's shot was tipped away, not by Szczesny, but by Oxlade-Chamberlain.
Hazard scored from the penalty spot and there was no way back for Arsenal.
Oscar scooped in from close range, then benefited from a goalkeeping blunder for his second. Salah then rubbed salt into the wounds with the final goal.