Vasco da Gama have announced the signing of former Brazil international striker Luis Fabiano from Chinese club Tianjin Quanjian.
Sao Paulo have announced the signing of Argentina international Lucas Pratto from Atletico Mineiro.
Rivaldinho, the son of Brazil legend Rivaldo, has joined Dinamo Bucaresti on a contract that runs until June 2020.
"I would like to thank the club and all the Corinthians fans for the messages and wish you all every success for the new season," Drogba said.
Monaco have beaten off competition from Manchester City, Liverpool and Inter Milan to sign full-back Jorge from Flamengo.
Hamburger SV signed defensive midfielder Walace from Brazilian side Gremio late Monday to boost its chances of avoiding its first relegation.