Fernandinho says he is happy to play in any role for either Brazil or Man City. Brazil winger Douglas Costa and midfielder Renato Augusto will miss Sunday's friendly against Croatia in Liverpool, England, raising further worries about the fitness of the squad for the World Cup.
Coach Tite already had injury concerns over Neymar, his fellow striker Gabriel Jesus and reserve right-back Fagner following troubled seasons for all three.
The Brazilian football confederation said on Friday that Costa and Augusto would sit out the team's first World Cup warm-up match at Anfield.