City's top-four finish in the Barclays Premier League and a place in Europe's elite club competition was secured thanks to Peter Crouch's 30th-minute own goal.
It came almost exactly a year after the striker had scored the winner in the same fixture last season to clinch Tottenham's Champions League qualification at City's expense.
It is a different story this time, with Spurs lying sixth in the table with two games to go and nine points behind fourth-placed City, who Redknapp expects will continue spending heavily on new signings over the summer.
"It seems to me they can go as far as they want to go," Redknapp said. "The sky is the limit. They have an owner who can spend anything he wants and they could go out and buy another four or five world-class players in the summer and try to win the Champions League. It won't be beyond them.
"They have good players already but I wouldn't say they are any better than us to be truthful."
Source: PA
Source: PA