If Maradona & his team outplay Brazil today then there would be no one questioning maradona's ability. It's high time for him & his team to deliver the best but if he fails then that would certainly raise many eyebrows concerning his coaching skills.
Maradona is a good individual player but so far not faired good as a coach. Whereas Dunga was not considered as good as maradona. It has been seen that coaching job is not for good individual players. Whereas a good team man can be a much better coach. A good player concentrates more on honing his skills and strength. But a team man tries to overcome his faults by sharing what he has to offer, which makes him able to understand others better than an good player who tries to win upon individual brilliance.