Bayern Munich midfielder Javi Martinez says Arsenal lack a quality striker to compete with the best.

Bayern will be defending a 3-1 lead at the Allianz Arena in their Champions League second-leg clash.

Martinez said: "Arsenal are less dangerous this season. The absence of Robin van Persie and Alex Song is significant.

"With Santi Cazorla on the pitch they manage the ball much better. For me Arsenal need to buy a striker to cause their opponents more problems."