sentences:  Following an injury lay off he returned on 20 September in a match against Goiás, and a week later scored for Corinthians in a draw against São Paulo FC.He finished the Brazilian Serie A 2009 with 12 goals in 20 matches.In February 2010, Ronaldo signed a contract extension with Corinthians that would keep him with the club until the end of 2011, and said he would then retire.