Marcos Antônio Silva Santos (born 13 June 2000) is a Brazilian professional footballer who plays as a midfielder for Campeonato Brasileiro Série A club São Paulo, on loan from Serie A club Lazio.

Born in Poções, Antônio joined the youth setup of Athletico Paranaense in 2014.

[2] On 30 September, he made his debut in a 1–0 win against CF Vasco da Gama Vidigueira, in Taça de Portugal.

[4] On March 13, 2020, he scored his first goal in Europa League in the 2-1 Shakhtar away victory against VfL Wolfsburg.

[8] He also represented the side at the 2017 FIFA U-17 World Cup held in India, and scored a goal against Honduras in the Round of 16.