Chelsea have suffered a shock defeat and their first home loss in the English Premier football League this season when Sunderland beat them 3-nil.
Nedum Onuoha became the first opponent to score against Chelsea in the league at Stamford Bridge this season with a memorable goal just before halftime and Asamoah Gyan and Danny Welbeck added in the second half.
Sunderland were beaten 7-2 at Chelsea last season.
The upset left champions Chelsea, who were without first-choice centre-backs John Terry and Alex, top of the table on 28 points, two ahead of Arsenal who won 2-1 at Everton.
Manchester United, who fought back to draw 2-all at Aston Villa yesterday are third on 25 points.
Sunderland moved up to sixth after ending a run of 11 successive defeats by Chelsea dating back to 2001.
