Jose Mourinho raised some eyebrows with his lineup selection on Sunday, leaving Diego Costa out of the starting 11, opting to go with some combination of Pedro and Eden Hazard leading the line instead. To some extent, the gamble has worked, as Chelsea have looked relatively secure at the back, and have created a few dangerous chances, not looking too bothered by Tottenham's high pressure.
Unfortunately, as has been the case far too often this season, Chelsea have mostly failed to put their shots on target when they do create a chance. They'll need to be far more clinical with their chances in the second 45 minutes if they want to keep this win streak going, though with several Tottenham players (including both starting fullbacks) on yellow, there could be a bit more space for the attackers to work with.
That said, this season has been such a roller coaster, that I'm not sure what to expect, regardless of how Chelsea have looked during the first 45 minutes. Cross your fingers.