This is a hard struggle for both of them to continue to maintain their position, Newcastle United will continue to fight hard to stay in their position and so will Manchester United where they don't want to lose to keep fighting, maybe they will target to return to third place, besides that the difference in points between the two is very short, the remnants of the next matches are very important matches for both of them.
Newcastle and Manchester United have a good chance to stay in the top four of the table as Tottenham have really struggled to win some games lately. Both of them have collected 53 points in 28 matches, so there is good hope to see them compete tightly to qualify for the Champions League this season. To be honest, I would be surprised if Newcastle actually qualified for the Champions League compared to Chelsea or Liverpool.
Manchester United will play Everton tomorrow, while Brentford will clash with Newcastle. Newcastle and United are the favorites in each match, mainly because Brentford and Everton are not in good form so far.
I'm sure Manchester United and Newcastle will continue their winning streak in tomorrow's game. The position of the two seems safe enough to continue to be in the top four. The performance of the Red Devils has indeed decreased slightly after Casemiro left, but after being defeated by Newcastle their performance has increased again despite only a narrow win over Brentford.
While Newcastle they are very confident after recording a series of consecutive wins. But the Magpies also have to be wary of Brentford's rise because they will be playing at home.