The 74-year-old cited Brazil's absence of an in-form centre forward and relative dearth of play-makers as a concern less than three months before the tournament begins, reported Xinhua.
"We have always gone to World Cups with great attacks and weak defence but this time it's going to be exactly the opposite," Pele was quoted saying by news service Uol Sunday.
The three-time World Cup winner rated Germany, Spain, France and Argentina as Brazil's major rivals for football's most coveted prize. He also warned England could cause a surprise.
"England won't win the World Cup, but they have a team that must be respected," he added.