Roma goalkeeper Daniel Fuzato is given a surprise Brazil call-up, while potential Italy player Gabriel Martinelli is named in their Under-23 squad.
Fuzato has yet to play any competitive games for Roma since arriving from Palmeiras in the summer of 2018, given he is third choice behind Pau Lopez and Antonio Mirante.
Nonetheless, the 22-year-old joins Juventus pair Danilo and Alex Sandro, plus Milan midfielder Lucas Paqueta, in the latest Brazil squad.
The shot-stopper has represented the Selecao before, picking up a solitary cap at Under-20 level.
The South American champions face Nigeria on November 14 before hosting South Korea four days later.
Martinelli, meanwhile, has been included in their U23 squad for a pre-Olympics tournament in Tenerife, which takes place in January.
The Arsenal forward, who only turned 18 in June, was born in Brazil but has an Italian passport and CT Roberto Mancini had expressed an interest in him.
Nonetheless, he will still be eligible to play for the Azzurri as the games in Tenerife are not competitive.
Atalanta defender Roger Ibanez and Torino stopper Lyanco have also been summoned.
Brazil squad to face Argentina and Nigeria
Alisson (Liverpool), Ederson (Manchester United), Daniel Fuzato (Roma), Thiago Silva, Marquinhos (Paris Saint-Germain); Eder Militao (Real Madrid), Felipe (Atletico Madrid), Danilo (Juventus), Emerson (Real Betis), Alex Sandro (Juventus), Rebioreports Lodi (Atletico Madrid); Casemiro (Real Madrid), Arthur (Barcelona), Fabinho (Liverpool), Douglas Luiz (Aston Villa), Coutinho (Bayern Munich), Lucas Paqueta (Milan); Willian (Chelsea), Rodrygo (Real Madrid), Gabriel Jesus (Manchester City), David Neres (Ajax), Roberto Firmino (Liverpool), Richarlison (Everton)
Brazil Olympic squad for friendly tournament
Anderson (Athletico-PR), Ivan (Ponte Preta), Phelipe (Gremio); Dodo (Shakhtar Donetsk), Guga (Atletico-MG), Ayrton Lucas (Spartak Moscou), Caio Henrique (Fluminense); Ibanez (Atalanta), Lyanco (Torino), Rodrigo (Portimonense), Walce (Sao Paulo); Bruno Guimaraes (Athletico-PR), Lucas Ferbioreportsdes (Portimonense), Matheus Henrique (Gremio), Pedrinho (Corinthians), Thiago Maia (Lille), Wendel (Sporting CP); Antony (Sao Paulo), Artur (Bahia), Gabriel Martinelli (Arsenal), Mateus Cunha (RB Leipzig), Paulinho (Bayer Leverkusen), Pedro (Fiorentina)
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