United, however, may face a fight on their hands to convince Martinez to snub the advances of Arsenal, with the striker having previously declared his desire to join the Gunners.
Martinez said: "I cheered for Arsenal when I was a kid - I love their style of play.
"It's flowing and open with a lot of first touch passes. It would be suitable for a player like me.
"If I get a chance to play for a high level club like Arsenal I wouldn't hesitate to accept it."
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