Real won 3-0 on the day, though Vini Jr took and missed a penalty ahead of the normal spotkick taker, Kylian Mbappe.
The decision infuriated Valdano, who said: "(The coach) has to intervene.
"And he sets the priority. The first is Mbappé and the second is Vinicius. And then on the field it's true that confidence plays a role, camaraderie often plays a role, the desire to be a team...
"I insist that at this moment the one who is fighting for the Golden Boot, and the one who scores them, is Mbappé."
Meanwhile, coach Xabi Alonso said of the incident: "Mbappé isn't the only penalty taker. We assign the takers, and Kylian is first. Then decisions are made. I like it when penalties are awarded; it's a good opportunity. Kylian scored the first one, and I would have liked to have scored the second. But Kylian is still the designated penalty taker."
Xabi admitted that "I was angry about missing the penalty; it was right before halftime and it could have been 3-0. Luckily, Jude Bellingham scored quickly afterward. That's the anger, that's all".
"Vinicius played a very good game," he concluded.