The two teams meet tonight in the Champions League.
Former Liverpool boss Benitez said: "This could be the year they win the Premier League.
"For me Wenger is the best coach in the Premier League and knows what his team must do.
"Arsenal will try to control possession and hit us with counter attacks. We have to do our thing, focus on ourselves and not on them.
"In modern football everyone knows the quality of their rivals. Arsenal is a very strong side."
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