Neymar has struck four times in as many games for the South American giants thus far, but Maradona believes that deficiencies in midfield and defence may hinder Brazil in their pursuit of a sixth world title.
"Except for a few moments of brilliance from Neymar, Brazil have not looked like potential champions," he told The Times of India.
"It was said that their defence is one of the best. Stoppers Thiago Silva and David Luiz, wing-backs Daniel Alves and Marcelo, with [Luiz] Gustavo and Paulinho as additional cover in midfield would not concede many goals.
"After three in four matches and many nervous moments in front of the goalmouth, this opinion has to change."
Tonight's clash with Colombia kicks off at 9pm.