Redknapp emerged from his opening fixture with a well-deserved point as his side responded to the challenge presented to them to secure a 0-0 draw at Sunderland.
Asked if he was more optimistic as a result of the display on Wearside, Redknapp said: "It's going to be tough, we mustn't kid ourselves.
"You look at the position we are in - it's very, very difficult. But I can see there are some decent players there.
"We need to play as a team and be a team and if we can put them together and get them to work together, we have got a chance."