I think the importance of today's Brentford game is high. If Arsenal can win this match, the difference in points will increase. According to the result of the match with Manchester City, it will now be easier to talk about who will be the champion in this league. I don't think there's any reason why Arsenal shouldn't be champions 
Arsenal chances of winning the Premier League this season are quite wide open, and what Arteta needs now is to continue to monitor the mentality of his players when facing opponents. Learn from the match against Everton which was first led by Sean Dyche, a person who knows the weaknesses of Arsenal players. He knew very well that by pressing hard to get Arsenal's youth players hooked and it worked. So I don't expect Brentford to do the same in this match.