Manchester United defender Chris Smalling is convinced Arsenal are due a wobble. United trail the leaders by nine points.
"We are starting play in good spells in games but we need to finish teams off.
"We don't want to see Arsenal get too far ahead, but we can only focus on ourselves.
"Nobody has won the title yet. Arsenal have started well but give it another month and there could potentially be another team at the top. There are going to be so many more ups and downs."
