Real had endured a difficult spell of results over recent weeks but they managed to get back to winning ways with a comprehensive victory at Betis.
Zidane was pleased with the result and feels that going forward his side must be looking to maintain the same level of intensity in the games to come.
He said: "They are intelligent, good players. They know we have to start in that manner and they did well.
"When we play with the intensity required it makes it very difficult for the opponent.
"We have worked on that, but we need to be consistent. This match is a reference point."