The United boss knows how he wants his team to play but has a variety of options in terms of personnel as he plots the downfall of Roberto Mancini's strongly-fancied Blues.
With decisions to be made in defence, midfield and attack, the line-up will be eagerly awaited ahead of kick-off for what is certain to be a pivotal match in the title race, one way or another.
"We've been working on two or three things in the last couple of days and I've got two or three options," admitted Sir Alex. "Hopefully, I'll get it right.
"I just know what we want to do in the game. We've got enough experience and pace in the team, enough good footballers and determination. I think we'll be alright in that respect. The game could be decided by anything, I hope it's not by a bad decision, that's for sure.
"There's focus on both teams to make it a good game. It's important as we're representing the city all over the world. Michel Platini is making an effort to come to the game. It creates a certain occasion and we want to represent ourselves the right way."
The manager is under no illusions that the title could be all but lost if City do pick up the three points, even though their next assignment looks difficult on paper - away at Newcastle - before the Reds kick off at home to Swansea.
"I think City probably would win it," he added. "Yes. I think, with two games left, they'd have a great chance."