After the international break, domestic football is ready to take centre stage again, and the first ever Madrid derby at the Wanda Metropolitano is what many football fans around the world are looking forward to the most.
On top of Madrid's troubles in front of goal at the start of this season, Zidane is worried about the physical state of two of his star players, who could both be feeling the effects of a taxing international break.
Modric played 180 minutes of football as Croatia secured qualification to next summer's World Cup in Russia, while Isco visited the Rosaleda Stadium, a homecoming for the midfielder, but he was withdrawn threw injury after a heft challenge from a Costa Rican player.
However, Zidane could let out a wry smile on Wednesday with the sight of both midfielders alongside the rest of the group in training, working as normal as they prepare for the clash against Atletico Madrid.
Meanwhile, Mateo Kovacic took part in the second part of the session, on his way to recovering from the muscular injury he suffered over a month and a half ago against APOEL in the Champions League.