We are very much in the midst of a three-team Premier League title race at the moment, although it remains to be seen for how long that will be the case.
Manchester City look in ominous form, and while Liverpool are also flying at the moment, they will have to deal with the loss of Mo Salah, Sadio Mane, and Naby Keita to the African Cup of Nations next month.
As for Chelsea, they are going throw somewhat of a difficult period. They certainly do not look as much of a force in recent weeks, with poor results arriving a much more regular rate.
That is to be expected over the course of a season, although they can't allow it to continue for much longer if they are to keep pace with City and Liverpool in the weeks ahead. Jimmy Floyd Hasselbaink is worried that their recent is a sign of complacency creeping into the team.
Speaking to Sky Sports, the Dutchman said that it feels as though some members of the Chelsea squad have taken their eye off the ball in recent times.
We're talking about them having a blip, but actually, they have been doing so well, absolutely magnificently, that people are looking at them conceding a few goals and a few things going against them like the West Ham game, and thinking there is something wrong. It happens.
Yes, they have conceded a few more goals than normal, and it might be that certain individuals might not be as focused as they were because it was getting a little too easy - so they might have to reset themselves on that front to put that right.
It's more complacency than going off the boil. Not putting in 100 per cent, putting in 90 per cent - and 10 per cent is a lot in the Premier League.
So looking at the West Ham game, they were winning and cruising; normally they don't look back, the opposition don't come back. So there must be some kind of complacency involved...
[Thomas Tuchel] doesn't have the luxury to drop a few players because of the injury situation at the club, Chalobah was playing, he's injured. Kante's injured too.
Alonso hasn't played a lot of matches, you need to look after him, and Chilwell is injured. Lukaku is only just coming back from injury himself, he hasn't hit his peak yet - and so on, and so on.
Thomas has to manage it in a different way, and dropping someone isn't always the best thing to do anyway. If you analyse why the players have a problem, or why they have conceded more goals, the 3-2 against West Ham was a fluke.
But the one against Zenit, that was proper complacency and you need to stamp that out.
It will be interesting to see how Chelsea if they can put this sticky spell behind them in the weeks ahead.
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