Former Brazilian international Rivaldo, a World Cup winner in 2002, left Sao Paulo on Friday, but the 39-year-old vowed to keep playing.
"This is not the time to say farewell to football. My aim is to finish my career at the end of 2012, I still have plenty to offer," said Rivaldo after Sao Paulo refused to offer him a new contract.
Rivaldo, who played in Brazil with Corinthians from 1993-1994 and Palmeiras until 1996, went on to enjoy a successful career in Europe.
He was Footballer of the Year with Barcelona in 1999 where he also won two Spanish titles in his five-year spell at the Spanish giants.
During two seasons with AC Milan, he won the Italian Cup and European Super Cup.
After leaving Italy, he played in Greece with Olympiakos from 2004 to 2007 and AEK Athens in 2008.
He then finished his international odyssey in Uzbekistan before returning to Brazil.