The Gunners are six points behind United with just five league games remaining this season.
“I can’t see Arsenal doing it,” said Redknapp.
“Chelsea have gone second in the table after their win and that six-point gap between Arsenal and United is going to be very difficult to overhaul.
“Big leads have been turned around before, it wouldn’t be the first time it has happened, and I don’t want to be disrespectful – but I can’t see them doing it.
“Yet Man United did not play that well against Newcastle on Tuesday. Chelsea might go on a terrific run and win every game.
“Man U have yet to play Arsenal and Chelsea so it’s not impossible.”
