Keane is facing an awkward day on Monday too when Redknapp investigates his players' secret Christmas party, which was arranged by the Ireland striker without the manager's permission.
When asked if it would be difficult to break up the Crouch-Defoe partnership, Redknapp - who favours using two up front not three - said: 'Of course. They have done really well. The goal when they combined against Manchester City in midweek was a classic case of the big'un and the little'un.
Uncertain: Robbie Keane's future at White Hart Lane appears in doubt
'All the football we played and the fantastic passing movements, then we had one ball from Gomes, Crouch gets up for a great header and Defoe is feeding off it and it's in the back of the net.
'That is route-one football at its best. In general we pass the ball unbelievably but sometimes that is just as effective. That is what you look for in a partnership when you have a giant and a little'un.'
Discussing the prospect of facing Blackburn, Redknapp said he would not change his style to counteract the expected aggression and doggedness of Sam Allardyce's team.
'We'll go there with a team trying to win because that is the only way we can play,' said Redknapp. 'We'll have two strikers and two wingers who can't defend. That is how we play, we won't go there to shut up shop. (Niko) Kranjcar and (Aaron) Lennon and the two up front - we'll have a go at them, see if we can break them down.'
Burgeoning partnership: Jermain Defoe celebrates with Peter Crouch
Meanwhile, Ledley King is back in training and Redknapp does not think it will take him long to rediscover top form despite the knee injury setback. 'This is how he's lived his life - play, then miss a week's training,' said Redknapp.
'It's nothing new to him. He's worked as hard with the fitness coaches in the last couple of weeks as he ever has.
'It was just one setback in the training match we had. It was a freak accident, he got smacked right in the face with the ball from three yards away, it threw him off balance and he was disorientated and fell awkwardly. His leg came down and jammed on the floor and his knee went.
'That could have happened to anybody, it was just a freak accident. They drained the fluid, the swelling has gone down and he is ready to train. He's not involved against Blackburn, though.'
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