Right before playing their missing game against Brentford, Manchester City are going to host Chelsea in two days. Winning this game is really important for the Manchester side. Because as long as they keep up with Liverpool until the Brentford game they will have a huge opportunity to take the lead.
I don't expect Liverpool to lose points against Brentford either. But their hands are tied about keeping the lead on one hand as I said. They shouldn't have lost to Arsenal.

From now on they will need to win as many games as possible until facing Manchester City in a critical game for the title.
Liverpool still have hope, but on the condition that they must sweep all matches with a win, it is something that is mandatory. In terms of points, let's say they are below Manchester City by 2 points, because Manchester City still has a match they haven't played. The meeting between these two teams will be very decisive later to determine which position is the best between them.
Brentford is not a very tough team, even so Liverpool should not underestimate this team, because they could give a big surprise that could make them swallow defeat.
In general, that is what Liverpool must do and one failure will make Manchester City move freely with the existing points difference. Currently, it can be said that Liverpool has a 1 point difference from Manchester City even though the Reds are at the top of the standings. Any excuses will not be accepted and Liverpool must win no matter what.
Good news comes from Liverpool because Mohamed Salah has started training with the main squad and it is possible that he will be played by Jurgen Klopp in the match against Brentford later. So Liverpool's chances of winning are even more guaranteed. Manchester City certainly shouldn't underestimate Chelsea and even though the Blues are an unstable team, I think they could surprise with their results. I don't have any expectations for Chelsea to win, but if they manage to hold off Manchester City's draw it will certainly be quite detrimental in the end.