Dimitar Berbatov scored his third hat-trick of the season as leaders Manchester United maintained their unbeaten Premier League record with a 5-0 drubbing of Birmingham City on Saturday.
Arsenal moved into second place with a 3-0 win over Wigan Athletic at the Emirates Stadium.
Robin van Persie scored a hat-trick for Arsenal but missed out on four goals when he skied a second-half penalty over the bar.
Fifth-placed Tottenham Hotspur lost ground on the leaders after drawing 1-1 at Newcastle United where Fabricio Colocinni scored for the home side and Aaron Lennon equalised in stoppage time.
West Ham United looked as though they had climbed out of the relegation zone, leading 2-1 at Everton going into stoppage time, before Marouane Fellaini equalised for the hosts.
Liverpool gave Kenny Dalglish his first win since he returned as manager with a 3-0 victory at Wolverhampton Wanderers in the early kickoff.
Manchester United lead the standings with 48 points from their 22 matches, followed by Arsenal on 46 from 23, Manchester City 45 from 23 and Chelsea 38 from 22.
