Chelsea won their sixth Premiership win in a row as they enjoyed a 2-0 victory away to second-placed Charlton.
Hernan Crespo and Arjen Robben were both on target for the defending champions in the second half.
Crespo had earlier hit the post for the Blues, although Charlton - who were unbeaten at the start of the day - also had their chances to score.
A last-minute goal at Sunderland denied the Black Cats a first Premiership win of the season against West Bromwich.
Other Premiership results
Fulham 1-2 West Ham
Aston Villa 1-1 Tottenham
Zoltan Gera headed in from a corner with seconds left on the clock at the Stadium of Light to devastate the home supporters.
Earlier, Gary Breen headed in after only seven minutes from a corner to put the home side in front.
Birmingham City survived going down to 10 men against Portsmouth and earned a good point after a 1-1 draw at Fratton Park.
Nicky Butt was sent off for the visitors after Lomana LuaLua and Jiri Jarosik both scored inside the opening six minutes.