Graham sees weaknesses throughout the Gunners squad.
He told the Daily Star: "I'm surprised Arsenal didn't get a couple more players in.
"They needed a centre-forward. If you are going to win the title, you need someone getting you 20 league goals, not 20 cup goals."
And Graham says Wenger should have drafted in a central defender, adding: "They could have done with an experienced goalkeeper.
"The goalkeeper they have got - Wojciech Szczesny - is still in a learning process.
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