CHELSEA and Manchester City underlined the growing certainty that this season's Premier League title will be a two-horse race with comfortable midweek wins over Spurs and Sunderland.
But it was Manchester City's comprehensive hammering of the Black Cats at the Stadium of Light which really caught the eye given that Chelsea could only draw 0-0 with Gus Poyet's team last weekend.
Manuel Pellegrini's team were a goal down to a Connor Wickham opener but hit back rapidly and eventually swamped a clearly inferior Sunderland side.
Sergio Aguero maintained his red hot scoring form with a brace and Stefan Jovetic and Pablo Zabaleta completed the scoring.
Chelsea, without the suspended Diego Costa, were still far too strong for Spurs in the London derby and Jose Mourinho's title favourites recorded another clean sheet and goals from Eden Hazard, Didier Drogba and Loic Remy.
"I'm so happy, the points, the goal difference, the performance," gushed Jose Mourinho after the game.
Chelsea are now six points clear of Manchester City and with Arsenal beating third-placed Southampton at the Emirates, the gap to third place is a chunky ten points.