The defending Premier League champions have gone up as Raheem Sterling and Bernardo Silva powered Pep Guardiola’s side to a 3-1 romp at Vicarage Road on Saturday.
The victory sends Manchester City (35 points) top of the table, a point above Liverpool, after Chelsea were beaten 3-2 by West Ham earlier on Saturday.
However, Thiago Silva put Chelsea ahead but Manuel Lanzini equalized from the penalty spot before Mason Mount’s superb volley made it 2-1 before the break.
Jarrod Bowen scored a fine goal to make it 2-2, as West Ham battled back well and several of Chelsea’s star players had an off-day.
Arthur Masuaku then crossed but it flew in to make it 3-2 and send the London Stadium absolutely wild.
This was the fourth time in seven attempts West Ham have beaten Chelsea at home in the EPL, and the home fans were in dreamland.