Captain John Terry's header put Chelsea five points clear of Manchester United at the top of the Barclays Premier League.
Terry glanced home a 76th minute free-kick from Frank Lampard although United claimed Didier Drogba was in an offside position.
United had their chances with Wayne Rooney twice going close but the Blues made it a club record of 11 straight home wins.
It was the home side who created the first goal attempt when Branislav Ivanovic burst down the right flank and let fly with a left-foot shot which Edwin van der Sar did well to hold at the near post.
United though were far more comfortable on the ball with the home side given little time to build from the back.
But a long cross from Michael Ballack in the 18th minute found the lurking Drogba on the edge of the six-yard box but the Ivory Coast striker failed to direct his header on target.
United, despite their dominance, had not created a clear cut chance.
source:espnstar.com