César Luís Prates (born 8 February 1975) is a Brazilian retired footballer who played as a right back, brother of Matteo Gentili.
He was known for his powerful free kicks, and played for 15 clubs during his extensive professional career in five countries, his biggest spell being four years with Sporting Clube de Portugal, where he won four major titles.
Born in Aratiba, Rio Grande do Sul, Prates started his career at Sport Club Internacional, where his steady performances attracted the attention of Real Madrid.
Prates earned a lucrative deal in the 2003 summer with Turkey's Galatasaray SK, but could not settle at his new club, and moved after a few months to Figueirense Futebol Clube.
After an impressive stint at Botafogo de Futebol e Regatas he moved overseas again, joining A.S. Livorno Calcio and being first-choice as the club finished sixth and reached the UEFA Cup.