Added by luca80sp:

For the 1970 FIFA World Cup, three brazilian networks (Rede Globo, Rede Tupi and TV Bandeirantes/TV Record) formed a pool, called Rede Brasileira de Televisão, once there was only one audio signal available, therefore, sharing the broadcast among themselves.
In the first half, Fernando Solera and Leônidas da Silva (TV Bandeirantes); in the second half, Geraldo José de Almeida and João Saldanha (Rede Globo).