Foden has 24 goals for City in all competitions this season and has often been utilised in more central roles by coach Pep Guardiola
Chelsea looked disjointed for most of the first half and in the 11th minute, Tottenham's Christian Eriksen whipped the ball home from just outside the area after a defence-splitting run from Dele Alli.
Just before halftime, Chelsea midfielder Nemanja Matic slipped the ball to Pedro, who executed a neat turn and curled a magnficent shot past Hugo Lloris.
After that, Chelsea looked rejuvenated and Tottenham, knocked out of the Champions League in midweek, were beaten by a 51st minute goal from Moses, whose bullet shot rebounded off Lloris and Jan Vertonghen on its way in to give Chelsea a seventh straight win.