Get the Sport24 daily newsletter delivered to your Inbox!
Get Sport24 on your mobile
Cape Town - Nigeria coach Stephen Keshi says the side are geared up for "serious business" in Brazil, and insists their recent results are in no way a reflection of their readiness.
The Super Eagles had jackhammered their way into the 2014 World Cup finals following an undefeated qualifying campaign, although that head of steam has slowly dissipated after failing to win any of their three warm-up matches.
Draws against Scotland and Greece were followed up by defeat to the United States earlier this week, raising concerns over Nigeria's ability to make any sort of deep run at the South American showpiece.
However, speaking ahead of Thursday's tournament opener between hosts Brazil and Croatia, Keshi said: "We are in Brazil for serious business.
"Friendlies are meant to serve as rehearsals; they are different from competitive matches.
"This is not an excuse for our performance in the matches, but seriously speaking, the results do not mean anything to me, evaluate us in the World Cup."
24.com publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.