The striking icon says that Dunga's team, who have lost their opening qualifier, are offering the nation's football fans little grounds for optimism:-
Two-time World Cup winner Ronaldo believes Brazil will struggle to qualify for the 2018 tournament, claiming that the current Selecao side is the weakest he has seen for years.
The South Americans were humiliated in the semi-finals of last year's World Cup on home soil, losing 7-1 to eventual champions Germany in Belo Horizonte.
The team's fortunes initially improved under new coach Dunga, who succeeded Luiz Felipe Scolari at the helm, but they were eliminated on penalties by Paraguay at the quarter-finals of the Copa America before suffering a 2-0 loss to Chile in their opening qualifier for Russia 2018.