Tottenham Hotspur drew 1-1 with Monaco on Thursday, with Erik Lamela netting Mauricio Pochettino's side's goal.
Redknapp, who used to manage Spurs, was less than impressed by his former side's display and bemoaned their second-half performance.
Tottenham had taken the lead through Erik Lamela, but they were pegged back when Stephan El Shaarawy headed home a late equaliser, and Redknapp felt it was a missed opportunity to get three points.
"Tottenham never got out of second gear," Redknapp said. "Monaco were there for the taking, but they waited and invited them on, and in the second-half they deserved a point."
Steve McManaman agreed with his fellow pundit on the night, with the former Liverpool player frustrated by Mauricio Pochettino's side's lack of killer instinct.
McManaman claimed that Spurs should have gone for the jugular when they got their noses in front, and that their failure to play on the front foot ultimately cost them.
"Monaco attacked for the last 25 minutes, and they scored a really nice goal," he said. "Spurs could have lost in the end. They shouldn't be losing games like this. They'll batter them a White Hart Lane, but it was noticeable in the second-half that the tempo really dropped."
Tottenham's draw against Monaco still leaves them in a promising position to qualify, and they currently top their Europa League group.
It also maintains their strong run of form since the start of the season, with the side tasting defeat only twice in all competitions.