Brazilian striker Neymar, 30, has resumed training in the team's general group under Tite.
Neymar suffered a foot injury in the first round of the group stage match against Serbia and missed the next two games.
"I feel good, I knew that I would now," Neymar wrote on Twitter.
Team Brazil will face South Korea in the 1/8 finals of the World Cup. The meeting will take place on December 5 and will begin at 11:00 p.m. Yerevan time.