Redknapp says their survival chances have been granted a huge boost.
"This gives us a chance, that's all," Redknapp said. "It is a chance and it keeps us in there.
"You could not have afforded to be cut adrift anymore. It was three big points which keeps us going.
"We needed a result at 1-1, we were playing with one up and I decided to push two up to really go for it with Loic Remy through the middle with Jay Bothroyd. We were 4-4-2, got the goal and I reverted back to 4-5-1.
"You start to look at the run of games, which ones you will win, which ones you will lose and whoever knows in football.
"You look at it and think we will beat them and then you go and lose.
"Then you think we will get beaten there and go and win, like we did at Chelsea."