Beckham joins AC Milan in January on a two-month loan and could be available in August 2009 on a free transfer courtesy of a clause in his current deal.
Writing in his column in The Sun, Redknapp stated: "It's a shame David Beckham isn't playing although, when he arrives in Milan in January, I'm sure he'll be a big success.
"He's a class act.
"He could still do a job at Spurs one day. Never say never in football."