Bentley looked set to leave Spurs earlier in the season when he angered Redknapp with his off-field behaviour and poor attitude in training, but the winger has been given another opportunity following a groin injury to Aaron Lennon.
Redknapp, impressed by Bentley's reaction, said: "David was out the picture but has trained well and has been fantastic. I don't hold grudges, I don't work that way, and it's there for anybody."
The former Arsenal man is keen to take advantage of his opportunity.
"I've just been looking to perform," said the England international.
"It's been a difficult time since I came here and you can't help that when the team have been doing so well without you.
"I just look forward to every game I play now and don't take it for granted. I go out there and enjoy myself.
"I just want to stay in the team and play as many games as I can. I am taking it game by game at the minute because you never know in football.
"My time at Spurs has been hard but hopefully I can start enjoying it now."