"You can't really see them slipping up because all the times you expected them to drop something, they've come up with the answer and you have to give them credit for that. They look in an unassailable position now," he said on BBC Greater Manchester Radio ahead of today's games.
"Our form since Christmas has been very good, but equally so has Arsenal's.
"They have been in fantastic form and you can't really see them losing now because they are in such a strong position.
"For Liverpool too, if we were to beat Arsenal they could win the league so it's an exciting time for them too. We can only do our job and see what happens."
Liverpool's defeat at Tottenham Hotpsur earlier this season looks to have ruled them completely out of contention, leaving a two horse race between Arsenal and United.
Whilst Arsenal are clearly favourites, the pressure is firmly on them as the season draws to a dramatic climax.