On paper arsenal looks favorite but arsenal should be careful going into this game because as everyone knows there is a new coach in Forest so this coach will like to prove a point in this game, so I expect a tough match tomorrow.As for Chelsea vs Brentford game it's going to be a tough match to be on the safer sides a BTS will be the best option to bet on this game.
Chelsea might be able to win at Brentford as long as Chelsea can put on a strong performance this weekend, but I can't make a clear prediction for Arsenal either, as Nottingham Forest is a team that pulled off more surprises last season. So, Nottingham Forest could deliver that at Arsenal's home this weekend, and if the match ends in a draw, Arsenal will certainly be at a disadvantage, having failed to win at home. So, in general, none of the Premier League matches this weekend are easy.