Redknapp revealed he now faces a dilemma at left-back after Bale impressed during the absence of Benoit Assou-Ekotto, who is now fit again after injury.
He told Hotspur magazine: "Yes, it's a massive dilemma, two great left-backs, but what a smashing dilemma to have!
"Gareth has done brilliantly, but Benoit is also a top, top player. We're very lucky in that position.
"Gareth is great coming on to the ball from left-back and it's a different position, wide left. It's a possibility, but we've Luka Modric and Niko Kranjcar in that position."