Lionel Messi (FC Barcelona)
Although his clause allows him to leave every summer, Lionel Messi's contract runs until 2021 and FC Barcelona will no doubt try to tie him down for as long as possible.
Thomas Partey (Atletico Madrid)
Atletico Madrid signed Thomas Partey until 2023, but with a buyout clause set at 50 million euros, any of Europe's biggest teams could swoop in.
Casemiro (Real Madrid)
Real Madrid's defensive pillar is tied to Real Madrid until 2021, and although his buyout clause is set at a cool 200 million euros, Los Blancos trust that talks for his renewal will begin soon.
Ever Banega (Sevilla)
The Argentine midfielder finishes his contract on 30 June 2020 and has a clause of 20 million euros. Sevilla unsuccessfully tried to renew it over the summer, but a new plan to try again is in the works.
Santi Cazorla (Villarreal)
After an ordeal of injuries, Villarreal opened the doors to Santi Cazorla, who at 34 is enjoying a terrific season. Even so, the Asturian finishes the contract in 2020 and his renewal is pending.
Joaquin Sanchez (Real Betis)
Eternal captain and Betis legend, Joaquin Sanchez continuesw playing at his 38 years of age and, although he finishes contract this year, is confident to maintain the policy of renewal course by course.
Samuel Chukwueze (Villarreal)
The Nigerian has become one of Villarreal's latest promises and, at the age of 20, the 65 million euros in his clause are no obstacle for some of Europe's greats.
Marc-Andrè Ter Stegen (FC Barcelona)
FC Barcelona live from both Leo Messi's goals and the German goalkeeper's saves. Although his clause is set at 180 million euros, the club wants to extend his contract beyond 2022.