From Messi to Ramos: Football stars who run out of contracts in 2021

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. 

Real Madrid giant Sergio Ramos has led his team to various Champions League and La Liga wins. Even though he is likely to retire at the Bernabeu, the 34-year-old Spaniard could still explore few options before he hangs his boots. 

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.

Having been served German giants Bayern Munich for over a decade now, David Alaba has decided to part ways with the club. Even though the talks between the two are underway, many pundits believe that Alaba will be moving out of the club.

Another free agent signed by PSG was Georginio Wijnaldum. Former Liverpool star is most likely to shine alongside Verratti and Di Maria in the mid-field position. 

Lyon's Memphis Depay is another name in Koeman's list. After Suarez's departure, the striker's position has been vacant at Barcelona. Koeman had already expressed his desire to sign the player.