Bent will return to White Hart Lane on Saturday for the first time since his acrimonious £10million departure from Spurs in August looking to add to his tally of eight goals.
The 25-year-old is the leading English goalscorer in the Barclays Premier League and remains an outside bet to make Fabio Capello's England squad for next summer's World Cup finals in South Africa.
Redknapp maintains there was no bad blood between him and Bent, who was never first choice at Spurs under the former Portsmouth manager, and reckons all parties concerned were happy with the transfer.
"Darren Bent scored goals for us and I had no problem with him," Redknapp said. "I think our chairman (Daniel Levy) did a deal where it pushes up to £16million on appearances and goals, so it was a good deal for us and a good deal for Darren.
"He's playing regularly for Sunderland and is becoming a big player in their team. He is now somewhere where he is able to play regularly and score goals and he's shown what he can do. He's a good player."