Here's the list of football stars across top European leagues who might become a free agent or sign another club by the end of 2021:
Barcelona star Lionel Messi's transfer rumours have been around since a year after a humiliating loss to Bayern Munich in the Quarter-finals of the Champions League. His relations with former Barcelona president Josep Bartomeu had also deteriorating. La Pulga's contract is expiring in 2021 and many clubs have their attention at the Camp Nuo.
(Photograph:AFP)
Sergio Aguero's era in Manchester City could come to an end if the Argentine decides to let his contract expire in 2021. Top European clubs have been on-alert and will looking to get a prolific striker who helped City to their first-ever Premier League.
(Photograph:AFP)