Chelsea maintained the pressure on Premiership leaders Manchester United on Saturday with a 1-0 victory over Tottenham that kept alive their hopes of retaining their title.
The champions closed the gap at the top of the table to three points ahead of Manchester United's 1615 GMT match at mid-table Portsmouth, with both title-chasing sides having just six games remaining after Saturday's matches.
Relegation-threatened West Ham stunned Arsenal with a 1-0 victory, becoming the first visiting side to win a competitive match at the new Emirates Stadium, while Liverpool left it late to beat hosts Reading 2-1. At Stamford Bridge, Ricardo Carvalho's 52nd-minute goal won it for Chelsea, who were always in control against Spurs.
The Portugal centre-half continued his charge forward before firing a low drive past Paul Robinson, who dived late, for his third league goal of the season. In a late substitute outing, Chelsea's England midfielder Joe Cole made his first Premiership appearance since breaking a foot in November.
At Emirates Stadium, the hosts laid siege to West Ham's goal but could not find a way past their outstanding goalkeeper Robert Green. Hammers striker Bobby Zamora scored with an excellent finish just before half-time.