Arsenal fullback Monreal: More to Man Utd than Van Persie
While Monreal acknowledges the Dutchman's threat, he says the champions are full of dangerous players - not least on the flanks.
"Their players are of the highest level, you can't just focus on one player because their team is full of players who can create and score.
"We must be on our guard and be aware of certain key players, like Robin, who has scored a sack of goals this year and is playing well. He is one of their main threats."