The midfielder entered the game at halftime and scored his goal in the 63rd minute.

Another of Zidane's sons is a goalkeeper in the club's youth squads.

Cultural Leonesa's lone goal came on a powerful long-range shot by midfielder Yeray Gonzalez.

Zidane also used the game to give some playing time to midfielder Casemiro and defender Pepe, who had been nursing injuries.

Also among the starters for Zidane was much-hyped 17-year-old Norwegian midfielder Martin Odegaard.

Before the game, a minute's silence was held in honor of the victims of Monday's plane crash involving Brazilian club Chapecoense.

Madrid had its round-of-32 games played in advance to open up dates for its participation in FIFA's Club World Cup later this month.

On Saturday, Zidane's men travel to Barcelona for 'El Clasico' in the league.

Trailing Madrid by six points in the table, the match is being viewed as something of a must-win for Barca if it hopes to retain its Primera Division title.

Barcelona has some work to do too in the second leg of its cup tie against third-division Hercules after its second-string could only manage a 1-1 draw on Wednesday.

Playing with several youngsters and fringe players, the Catalans needed a 58th-minute goal by 18-year-old Carles Alena to cancel out David Mainz's strike for the host six minutes earlier.

The return leg is on Dec 21 at Camp Nou.

"We are going to try to advance," Mainz said.

"We know it's going to be complicated, they may use some first-team players, but who knows?"

Elsewhere, visiting Atletico Madrid pounded third-tier Guijuelo 6-0 in their first-leg last-32 tie.