Chelsea has to work on their defence line and how to coordinate them, assuming they played against Arsenal or Liverpool and they scored an early goal as Tottenham, I don't think they can make a way out due to their current performance. I'm happy for their victory because they are able to make a different against arsenal that were competing with them. At least they are two points away from arsenal which they can maintain.
Chelsea has minor problems comparing to Manchester City, Tottenham Hotspur and even Arsenal.
They received 3 goals by Tottenham but their attack line was good and did their job by scoring 4.
The problem is obvious with Manchester City collapsing with only 4 goals collected in the last five games only, making them far from Liverpool and that gap didn't increase because Liverpool game was postponed.. Arsenal missing two points will make them behind also. If nothing will change then it is the season of Liverpool and Chelsea by far.
I think the issue of poor defending is not peculiar to Chelsea alone it cut across all the top clubs, even Arsenal that use to have solid defense had been porous this season I can attribute it to strong attackers in all the premier league clubs, however the first two goals conceded by Chelsea yesterday was caused by Cucurella who slipped off consequently losses possession to Tottenham Hotspur player who capitalized on the errors to score their goals, eve Liverpool defense too isn't that strong now that Konate is out injured same with Arsenal, Man Utd and Man City that is why clean sheets is no attainable in the league.