Jermain Defoe's hat-trick earned Spues a 3-1 win at Elland Road on Wednesday night but Redknapp was pleased to see Bentley playing at his best again in what he described as a difficult game.
"He has come back and taken his opportunity," the Spurs boss said after the match.
"He has shown what a good player he is in the last couple of games and he needs to keep on doing that."
"He's got to keep working hard."
"These are difficult games. I've won and lost these games when you're fancied to win.
"Now we have another tough game at Bolton. It's not an easy place to go, but we're playing very well. We've had one defeat in 13 games."