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The 52-year-old was not happy with his side's performance in their opening game, insisting they must do better when they face Bosnia

Nigeria coach Stephen Keshi has criticised his players for being "nervous and unsettled" as they kicked off their World Cup with a 0-0 draw with Iran.

The Africa Cup of Nations champions dominated the game against the Asian side but failed to make their possession count as they came up against a disciplined defence and were forced to settle for a point.

And Keshi believes his players were not in the right frame of mind as their hopes of reaching the second round were dealt a significant blow.

"The boys were too nervous and unsettled," he told Optima Live. "You don't do that at this stage.

"It happens in football. We really didn't perform as expected but we have to move on.

"I wanted a win but must take a draw. We must do better to get a win against Bosnia."

Nigeria face Bosnia and Herzegovina in their next Group F fixture on Saturday.