Marcelo and Costa back in training

Brazil were given a boost in the build-up to their World Cup quarterfinal against Belgium as Marcelo and Douglas Costa both took part in training on Tuesday.

"Douglas Costa was released to return to training and took part in today's activity," wrote the Brazilian Football Confederation on Twitter.

The Juventus winger has only featured once in Brazil's campaign in Russia so far, coming off the bench in the 2-0 victory against Costa Rica in their second group outing

Marcelo missed the last 16 game against Mexico with a back problem, with Filipe Luis filling in at left-back.

Midfielder Casemiro will miss that game due to suspension, with Fernandinho expected to replace him in the starting line-up.