Belgium boss Martinez acknowledges that the five-time world champions boast more pedigree than his adopted nation, but is banking on team spirit prevailing over individual talent.
"The two sides are very similar in terms of qualities. The difference is we haven't won a World Cup - simple as that," he told reporters at his pre-match presser.
"When you go into a tournament if you don't have that knowhow of winning one you can't have an advantage on the opponent. We shouldn't play Brazil, we shouldn't be in awe of the opportunity we have. We need to enjoy our game, be ourselves. When we do that our talent shows.
"There is something special in this squad, no doubt about it. The signs are positive and of a real desire to be on the football pitch. We can't wait. I feel we are as ready as we can be. Over the last two years we have been working towards this moment."