Nigeria coach Stephen Keshi has insisted that boss Carlos Queiroz could be Iran's "biggest weapon" ahead of their fixture in Group F.
The two teams get their World Cup campaign underway in Curitiba on Monday evening, but after previously revealing that he is not too familiar with Iran's squad, Keshi has admitted that he fears the impact his counterpart could have on the minnows.
The 52-year-old is quoted by FIFA.com as saying: "I think that their coach is their biggest weapon, because he's well experienced, he knows the game well."
The first game in Group F saw Argentina record a 2-1 victory over Bosnia-Herzegovina on Sunday evening.
