Real Madrid coach Santiago Solari has urged fans to ease the expectations around Vinicius Junior.
The Brazilian scored and starred in this week's Copa del Rey win over Leganes.
Real Betis is to host Real Madrid on Sunday at the Benito Villamarin Stadium in Seville.
Solari said, "He is progressing".
"All of the players are important and will continue to be so". A kid of 18 has arrived and doing is very well.
"We don't know whether he'll be involved tomorrow, we need to wait a bit before announcing the squad list, but we'll know either way during the course of the day".
With Marco Asensio, Gareth Bale, Toni Kroos, Thibaut Courtois and Marcos Llorente all struggling with injuries, Solari admitted the club might have to change preparation and training.
On the wider fitness issues he added: "I would not call it misfortune, but an occupational hazard". "[Injuries] are part of the game".
Spain worldwide Isco is yet to start a league match since Solari replaced Julen Lopetegui in the Santiago Bernabeu dugout, leading to reports linking him with a move away from the Champions League holders.
Solari generally found himself having to perform a similar role during his time as a Blancos player as he played second fiddle to some of his more illustrious team-mates.
"There are players here with lots of experience and trophies".
However, Mariano did join the team for part of the practice. "Players who reach the Primera Division, play here for many years, and have won a lot, they know what they need to do".