Chelsea extended their lead at the top of the Premier League table on Sunday to 5 points over Manchester City, after beating Arsenal 2-0 in a feisty London derby. Eden Hazard opened the scoring for Chelsea in the 27th minute, coolly slotting home a penalty past Arsenal keeper Wojciech Szczesny. The Belgium international earned the penalty himself, darting his way into the Arsenal area, only to upended by defender Laurent Koscielny. Diego Costa continued his rich vein of scoring, making sure of three points for the home side when he chipped the ball over Szczesny after latching onto an exquisite Cesc Fabregas pass. Arsenal manager Arsene Wenger has now faced rival manager Jose Mourinho 12 times in the Premier League, but has yet to beat him. (For more sports news and updates, follow AhramOnline Sports on Twitter at@AO_Sportsand on Facebook atAhramOnlineSports.) http://english.ahram.org.eg/News/112414.aspx