Neymar is up there as one of the top three players in world football and Vinicius Junior's ability to showcase his talent at Real Madrid at just 18 years old is "not normal", according to Casemiro.
As Brazil prepare for their friendly matches against Panama and Czech Republic, Casemiro expressed his admiration for the Paris Saint-Germain forward and his Madrid team-mate, both of whom are ruled out of international duty by injuries.
While Neymar has made 96 appearances for the Selelcao in the nine years since making his bow, Vinicius has yet to be handed his full international debut.
But Casemiro feels the 18-year-old's recent form for Madrid, where he has made eight La Liga starts and scored two goals in 2018-19, mean he is currently operating at a world-class level.
"We started talking about Neymar here," Casemiro told reporters. "Let's spend the whole afternoon talking about him.
"For me, Neymar's in the top three and has everything to be the best in the world. In the last two months Vinicius played at a high level, at a level of one of the best in the world.
"What he's producing at Real was not normal, for someone who's 18 years old. Being bold in the shirt of Real Madrid is not easy."
Tite has the likes of Everton forward Richarlison and West Ham winger Felipe Anderson in his squad to face Panama and Czech Republic, but Casemiro knows there will be some tough decisions to make when Neymar and Vinicius return to fitness.
The PSG star is recovering from a fractured metatarsal after suffering injury in January while Vinicius has damaged ankle ligaments, and Casemiro backed the pair to flourish upon their comebacks.
"We're talking about two great players, two players who are exceptional," said Casemiro.
"It is up to the coach to talk about whether they can play together or not. There's no doubt they are great players.
"Of course, they can play in any team in the world."
Brazil's match against Panama takes place in Portugal on Saturday, while the clash with Czech Republic is on Tuesday in Prague.