Iniesta underwent tests at the club's training ground on Friday after being substituted during the 1-0 Copa del Rey quarterfinal first leg win.
Real Madrid coach Zinedine Zidane says Cristiano Ronaldo remains the player "who makes the difference" amid growing criticism of his form.
Snapchat are about to launch a new line of football-related filters for some big clubs in Europe.
A debate has opened up among Real Madrid fans and pundits over whether a decline in output from Cristiano Ronaldo is to blame for the club's woes.
The Spanish government's anti-violence committee has decided not to sanction the Sevilla fans who insulted Real Madrid defender Sergio Ramos.