The transfers for the Portuguese Liga for the 2009–10 season began after the 2008–09 season finished on 1 July 2009 and closed at midnight on 1 September 2009. The transfer window then reopened during January 2010.
The transfers for the Portuguese Liga for the 2009–10 season began after the 2008–09 season finished on 1 July 2009 and closed at midnight on 1 September 2009. The transfer window then reopened during January 2010. (en)