Arsenal survived a scare from Tottenham Hotspur, who missed a penalty at 1-1, before emerging 2-1 winners in a London [Images] derby on Saturday to extend their Premier League lead to four points.

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Arsenal were below their best for much of the game at the Emirates Stadium but took the points with two pieces of clinical finishing.

Emmanuel Adebayor opened the scoring in the 48th minute after he was sweetly set-up by a Cesc Fabregas backheel.

Spurs equalised through Dimitar Berbatov in the 66th minute but blew their chance of a first win over their local rivals since 1999 when Arsenal keeper Manuel Almunia saved Robbie's Keane's penalty six minutes later after Berbatov had been tripped.

Arsenal took full advantage when teenaged Danish striker Niklas Bendtner climbed off the bench to head home a Fabregas corner in the 76th minute.

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