Demba Ba grabbed two goals, with Samuel Eto’o and Eden Hazard also on the scoresheet, as Jose Mourinho’s side went seven points clear
Chelsea moved seven points clear at the top of the Barclays Premier League after a hard-earned but ultimately comfortable London derby win.
The decisive goals came within a five-minute period in the second half in which Spurs, who for much of the preceding 55 minutes had looked the measure of a Chelsea side not at its best, imploded.
First, Jan Vertonghen gifted Samuel Eto’o the 300th goal of his club career before Eden Hazard slotted away a penalty that had seen Eto’o fouled by Younes Kaboul, who was sent off.
That looked to be it until the final few moments, when sub Demba Ba notched his first goals of 2014, first slamming home from close range when a loose ball fell to him, and then dispossessing Spurs keeper Hugo Lloris to knock into an empty net.
It means Chelsea are unbeaten in 15, with 11 clean sheets in 16 games, and without a defeat against Spurs on home soil since 1990.