Keegan said: "I don't know what my record is like against Sir Alex, but I don't think it is as bad as some managers. I'm sure it is not the worst.
"They have got the form and we have not, so we will see if we can surprise a few people. We have had a little bit of a break and we have worked the players a little bit harder.
"We gave them a couple of days off, but they are back now and fresh - and we know what is ahead of us on Saturday. I have been pleased and we are building up to what is a very big game for us."