Argentina skipper Lionel Messi has revealed there are no easy opponents in world football after the La Albiceleste were drawn against African champions Nigeria, Iran and Bosnia Herzegovina.

Messi who is in line to win a fifth consecutive Ballon D'or admitted that he was happy facing old foes Nigeria in Brazil.

"Happy to meet rivals (Nigeria) in Brazil 2014 World Cup," Messi said.

"But there are no easy teams and all groups are complicated."

Messi who is recovering from a tear in the grounds of the Argentina Football Federation in Ezeiza will lead his charges against Bosnia-Herzegovina in their opening fixture at the Maracana in Rio before tackling Iran in Belo Horizonte Mineirão with their final group game against Nigeria on 25th of June at the Beira Rio in Porto Alegre.

Messi had earlier in an interview said his favourite teams to win the 2014 Brazil World Cup are Germany, Brazil, Spain, France and Argentina.

"Germany, Brazil, Spain, France and us also," said the Barcelona forward during an interview with Buenos Aires' radio station La Metro in Spain, when he was asked on his favourite teams to win the 2014 Brazil World Cup, Xinhua reported.