Barcelona forward Lionel Messi starts talks over a new contract, while striker Luis Suarez is set to sign a new deal until 2022.
Details of Cristiano Ronaldo's income has been published by his agent's company as they continue to deny claims of tax evasion by their clients.
Barcelona coach Luis Enrique is confident Lionel Messi will sign a new deal with the club after reportedly opening talks to extend his contract beyond 2018.
Barcelona can apply some pressure on Real Madrid by cutting the gap at the top to three points with victory at rock-bottom Osasuna on Saturday.
Real Madrid can set a club record by extending their unbeaten run to 35 games when they host Deportivo La Coruna on Saturday.