I see Chelsea being in the same case as Manchester City, winning today's match and later losing the upcoming weeks matches. This is how both teams will disappoint their fans until the end of the season when one of them will mistakenly top the other with a point or two.
The situation of Chelsea and Manchester City is very similar. Both the teams' performances are very erratic. It is not possible to predict which match they will play well and win. And that is why the fourth place in the table is still uncertain for both the teams.
Chelsea is playing against Arsenal now. Arsenal has a high chance of winning this match. If Chelsea can get 1 point from this match then it will be a big achievement for Chelsea. However, Arsenal is leading 1-0 after 70 minutes of the match. We are not seeing much good gameplay from Chelsea. Chelsea is probably going to lose points in this match too.