Newcastle winning their match or not will not affect Chelsea position in the table like the teams behind them. Newcastle have the same points with Chelsea but they have more goals which is the reason they are above Chelsea on the table. Chelsea should be more concerned about Aston villa and Nottingham forest because these two teams are the threat that will hinder Chelsea from qualifying for the champions League. For that prediction to come to pass, every teams in that list must win their next game and there won't be any changes to that list.
The question is "will Chelsea beat Nottingham forest?" That's a controversial question because Chelsea can not be rely on and likewise, Nottingham forest is not doing too well as well at the moment.
for that question there are indeed many answers that will be expressed, but I see their match between Chelsea and Nottingham Forest which in the past when they faced each other of course the number of goals entered by both of them was not much different, but from the predictions that I monitored maybe both will end in a draw, and ensure they enter the Champions League next season, and Chelsea is currently in 5th position in the standings and Nottingham Forest is 7th and both have ensured to strengthen their performance before the match.
A draw would not guarantee them a Champions League place because if Aston Villa and Newcastle both get wins, then Chelsea will drop to 6th place, while Nottingham will remain in 7th place. The only sure guarantee is victory, but that only applies to Chelsea, while Nottingham still has to depend on other teams. This is shaping up to be a very exciting match to look forward to. Chelsea may have a more glamorous squad than Nottingham, but Nottingham has the advantage of playing at home, and their players have good chemistry with each other.
Your analysis are correct and i understand the fact that Nottingham Forest is playing at the home but that zeal and energy they got the first time when they met Chelsea at Stamford bridge and played draw is no longer there again because they have really decline in performance while Chelsea is at a better performance now and would not like to jeopardize their chance of qualifying for the Champions League games next season so they will take the match more serious than Nottingham Forest. Chelsea will win Nottingham Forest but it might just be a slim win which will help them secure a Champions League position. I don't also want to neglect that Nottingham Forest have good forwards who are active in goal scoring and they can still frustrate Chelsea from making it to the Champions League, it is very much possible.