Arsenal legend Sol Campbell feels doubts over the goalkeeper status could derail their title push.
Campbell believes the battle between David Raya and Aaron Ramsdale can work against the team.
He told The Sun: "The only sticky part is the David Raya/Aaron Ramsdale situation.
"In those really tense moments, on a knife-edge, you need to know exactly what your goalkeeper is going to do.
"If it keeps on changing, or if this situation carries on, no centre-half will turn around and say, "Yeah, we don't mind". Your mindset changes. Doubt creeps in. At this elite level, another half a second of thought can cost you."
