With just eleven games left to play, the Reds are 12 points ahead of Manchester City and they are unbeaten since November 17.
Chelsea are 19 points behind at this juncture although at one time they did sit top of the table earlier in the season.
But Mikel now says: "It's a one-horse race. To be realistic, I don't think anyone will be putting money on us or City to win this title.
"It's all about United. It is difficult to see anyone catching them."