Manchester United boss Sir Alex Ferguson admits he could field his attacking quartet of Wayne Rooney, Dimitar Berbatov, Carlos Tevez and Cristiano Ronaldo against Celtic.

"My torment," he said, when asked what he was going to do.

"It is very difficult trying to gauge whether I can play the three of them together.

"I have been thinking about it for a couple of weeks now. It is possible, with one of them playing in behind.

"It is a very difficult situation because they are all terrific players."

It is the kind of situation Ferguson has craved since 1999, when Andy Cole, Dwight Yorke, Teddy Sheringham and Ole Gunnar Solskjaer struck fear into the heart of Europe.

At a combined value of around £150million, little wonder Ferguson feels his side is stronger than the team that fought out two highly-charged duels with Celtic in the group stage two years ago.

"The squad is much better," he said.

"We have bought Berbatov, Tevez, Anderson and Nani since then.

"Plus there is a general improvement in the team, which you can see in the progress we have made over the last two years.

"It is not easy to win leagues down here but we have done it well."