Manchester United boss Sir Alex Ferguson says there are three teams in this season's title race.

Ferguson raised the stakes for their game at Arsenal by saying the title seems to be a three-horse race between United, the Gunners and Chelsea.

He said: "I wouldn't say we're certain to win the League, or Chelsea and Arsenal are certain. We all have a chance. All the others have a chance of fourth."

And he reserved praise for Wayne Rooney who could face Sol Campbell tomorrow.

"At this moment, Rooney is in great form. He's shown it in periods every season but hopefully, this lasts."