United went back to the top of the Premier League and kept their unbeaten league record intact following a goalless draw against Tottenham at White Hart Lane in which United full-back Rafael was sent off.
But after a match of few clear-cut chances Redknapp said: "I couldn't say they (United) are on another level and are going to walk away with the title. I can't see them going the year unbeaten. There are lots of teams who could beat them on any given day.
"You can't be as good a team as you were a year or two ago when you had (Cristiano) Ronaldo and (Carlos)Tevez.
"I think other teams have improved and got closer to them, but at the moment they are still top of the pile after losing players like that."
Source: PA
Source: PA