Beckham is due to return to Los Angeles Galaxy on Wednesday to prepare for a new season in Major League Soccer.
He has been training with Spurs during the club's off-season and Redknapp's one regret is that he was unable to seal a loan deal for the midfielder.
Redknapp said: "I think David will go back on the ninth (of February). I would like to have had him playing as he has looked great in training.
"He is so slim and so fit, he is a fanatical trainer. He works in the morning and the afternoon in the gym. He just loves playing football.
"He could be at home now sitting around the pool. I am sure he has a decent enough semi in Los Angeles but he is over here wanting to play football. Most footballers would want to be in Los Angeles. But that is what has made him what he is. He wants to keep playing and he is a mega rich man. He just loves the game."
Source: PA
Source: PA