The Spurs boss has said that he could be tempted in to making an approach for the 33-year-old Real Madrid striker should Roman Pavlyuchenko leave White Hart Lane during the transfer window.
"He is interesting," Redknapp has said.
"I wouldn't sit here and say it isn't of interest but again it would depend what the deal is because the chairman would deal with that side of the business.
"But he is an interesting player. He was a fantastic player in England and he has been a great player over the years and is a great goalscorer and if he was available it could be of interest and that's about as far as it's gone.
"I wouldn't want to say no we're not interested and then two weeks down the line we go and do something. I wouldn't do that to you, that isn't right.
"It's not impossible that if it was right we could be interested.
"I think Pav is looking to move. I look at him out there in training this morning and think he was tremendous his goalscoring and everything else.
"Only if someone came in and he decided to go and he wanted to go and it was a good offer otherwise it wouldn't be possible.
"I couldn't end up with five strikers, it's difficult enough with four because they are all very good and I like them all.
"I find it hard leaving one of them out of the picture more than I would like to, it's not easy so I wouldn't be looking to have five strikers."