Barca host Real as La Liga and Copa del Rey champions, but Zidane's side will not perform a "pasillo", the tradition of players applauding their opponents on to the pitch. They meet Liverpool in the final in Kiev, Ukraine on 26 May.
"This was a clasico with nothing at stake but we saw a great game", Zidane told reporters. It had extra caffeine.
Barca exploded out of the blocks and they were ahead within 10 minutes.
"He doesn't feel good now, but I don't think it is anything serious", Zidane said. "We will have him ready".
La Liga will introduce video technology next season and Zidane, rather pointedly, said: "Then we'll see how a match like this turns out".
Messi almost put Barca ahead for a third time in the 82nd minute but Navas was alert to keep out the Argentine's stinging effort at the near post. Pretty clear that there was contact on Marcelo's right leg which results in the Brazilian going down.
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Messi's goal likely shouldn't have stood as Suarez was too aggressive in winning the ball from Varane, but the French defender didn't have the strongest footing and could have done better.
Referee Alejandro Jose Hernandez Hernandez took most of the headlines afterward by angering both sides with a number of debatable calls, with Madrid captain Sergio Ramos claiming the official's decision-making had been affected by a half-time harangue from Lionel Messi. He and de Stefano differed in games against Barcelona for 18 times.
Real's Ronaldo was substituted at half-time after suffering an ankle sprain while scoring.
Ronaldo appeared to shake off the injury.
The constant on-field confrontations and meaty challenges led to referee booking Ramos and Barca striker Luis Suarez as well.
Ronaldo stayed on the bench and, without its star, Madrid couldn't impose its numerical advantage. Just as Suarez initiated his goal, so did Ronaldo, a neat backheel freeing Toni Kroos, who found Karim Benzema at the back post.
Barca played 45 minutes with 10 men but managed to extend their record undefeated streak in the top flight to 42 matches, a record that stretches back to April 2017.
Messi looked poised to get another goal but Bale made it 2-2 by using one touch to curl Asensio's pass around Ter Stegen. No other manager has ever won more than three. Guess we will find out next season.