Arsenal's Arteta backing Moyes for Man Utd success
Arteta played for Moyes at Everton.
"We hope the fact all the other top teams have changed their boss will help us this season. When you bring in a new coach, you need time to adapt.
"But I still think United will be a big threat.
"I worked with David Moyes at Everton for many years and he's a very clever man.
"He knows he's working with players who have been really successful so I don't think he's suddenly going to make too many changes. He doesn't need to."