Two goals either side of the break from Stan Collymore helped Nottingham Forest see off Chelsea at Stamford Bridge.
Collymore netted his first on 33 minutes and added his second nine minutes after half-time.
The result stretched Chelsea’s winless run to eight league matches and they dropped to 13th with 31 points, while Nottingham Forest sat fifth with 45 points.
Dimitar Berbatov rescued Manchester United as they fought back from two goals down to win at Blackpool and extend their lead at the top of the table.
Craig Cathcart headed in Charlie Adam's 15th-minute corner and DJ Campbell gave Blackpool a 2-0 lead, which they held until the 72nd minute.
But Berbatov turned in a Darren Fletcher cross and Chicharito levelled two minutes later, before Berbatov hit an 88th-minute winner.
Man United moved five points clear at the top, with Arsenal their nearest challenger, while Blackpool dropped to 12th place on 28 points.