Antônio Naelson Matias (born 23 May 1976), known as Sinha[2] or Zinha, is a former professional footballer who played as an attacking midfielder.

Sinha was born in Itajá, a city located in the northwest of the Brazilian state of Rio Grande do Norte.

Sinha is widely known for his dribbling skills, his accurate passing and his intelligence on the pitch as well as his leadership and long distance shot.

[5] However, all players were exonerated as FIFA determined that the accused had accidentally ingested the banned substance through contaminated meat that had been served during a pre-tournament training camp.

[8] His final competitive match would come during a difficult time for the Mexico national team, as they barely qualified for the World Cup playoff against New Zealand.