Arsenal have shown on their day that they can be a class act but those are too few and far between.
United have had a resurgence under their unbeaten caretaker boss Ole Gunnar Solskjaer but were hopeless before his arrival.
Chelsea are the team in possession of the precious fourth spot and Nicol thinks Maurizio Sarri’s side will cling on because of the Gunners’ defence and the confidence knock United will take when they finally lose.
Nicol told ESPN: “Yeah I think they [Chelsea] will [finish in the top four].
“I don’t particularly trust Arsenal or Manchester United”
“I don’t particularly trust Arsenal or Manchester United.
“Yes, Manchester United are a runaway train right now, but I can’t wait to see how they handle some adversity, what will Solskjaer do?
“It’s dead easy when you’re just winning. It’s the easiest job in the world when your team’s just winning and winning.
“You don’t have to do too much, you just keep them happy and keep them fit but when some adversity happens, I’d love to see how the players react.
“And as I’ve said before I don’t trust Arsenal’s back four. They were great last weekend, yes, but I don’t trust them.”
Chelsea are still fourth despite their 2-0 loss to Champions League chasing Arsenal last weekend.
The Blues are three points clear of the Gunners in fifth and United in sixth and have a better goal difference than the pair with 15 Premier League games left to play.
Chelsea have showed signed of unravelling over the last week with Sarri lashing out at his players and Eden Hazard in particular, stating that he is not a leader and should concentrate on his football rather than a move in the summer.