Manchester United striker Wayne Rooney says Manchester City will not be their lone title challenger.
The two clubs sit top of the table with 100 per cent records.
"It is a great start for the two clubs," he reflected.
"But Chelsea will always be there and whilst it is looking difficult for Arsenal, they are a great team, with a great manager and you can never write them off.
"Liverpool are doing well too, so I am sure there will be a few teams fighting it out.
"There is still a long way to go and we just hope to continue on."
