Real Madrid coach Santiago Solari has criticised Isco's fitness, seemingly revealing why the midfielder has been out of favour this season as he was omitted from the squad once again.
Isco, 26, has made just five La Liga starts this campaign, and none since Solari took charge in late October.
While Solari was unwilling to be drawn into that matter, the Argentinian hinted that the midfielder was struggling to maintain his appropriate fitness levels as his exile continued this week when he was left out of the squad for Sunday's trip to Real Valladolid on Sunday.
"Disciplinary issues are handled internally," the coach told a news conference.
"To play, you have to be in the right physical shape first and then you have to maintain it."
Solari's future with the club remains very much in doubt, with Goal understanding that Jose Mourinho is being lined up to replace the Argentine in an interim role after a wretched 11-day period that some critics have dubbed the worst in Madrid's history .
And Isco is not the only player to have drawn the ire of the current manager, who claimed that he had directly spoken to the players he didn't think had fallen in line .
Other star names like Gareth Bale and Marcelo have had their struggles, and a bust-up with Florentino Perez has left the future of club captain Serigio Ramos in some doubt as well .
Madrid are third in La Liga, 15 points behind rivals and leaders Barcelona heading into Sunday's match and have just 12 matches remaining to try and close the gap on the runaway league leaders.