Zinedine Zidane offered no excuses after a Real Madrid side who lost Sergio Ramos to injury were humbled by Cadiz on Saturday.
Anthony Lozano scored the only goal of the game in the 16th minute as the reigning LaLiga champions were stunned by their newly promoted opponents, who matched their hosts' tally of 14 shots despite having just 25 per cent possession.
The result was a surprising setback ahead of a week that includes the start of Madrid's Champions League campaign – they take on Shakhtar Donetsk on Wednesday – and a trip to rivals Barcelona.
Zidane was full of praise for Cadiz in the aftermath, admitting they were far sharper than his own team as the minnows claimed their first away win over Madrid.
"We have no excuses, it is a bad game and we must congratulate Cadiz," Zidane said, according to Marca.
"They have shown more rhythm, more desire. We are not happy. It is what can happen in football."
He added: "We do not physically enter the game and it shows. There are no excuses and we have to see how we can change it.
"We have lacked many things. If you do not have rhythm in a LaLiga game it is complicated, they have had more rhythm and more eager."
Defender Ramos was substituted at half-time and watched the rest of the game from the stands with ice on his left knee.
"It's a nuisance, we'll see what he has," Zidane said of the Madrid captain's injury. "We hope it is not too serious, tomorrow (Sunday) we will see what it is exactly, hopefully not too much."
The Frenchman also dismissed any concerns that the result will have a lasting impact on his squad.
Madrid received some good news with Barcelona's defeat at Getafe in Saturday's late kick-off, meaning the two rivals have both lost heading into a Clasico contest for the first time since April 2003.
"We have only lost three points. They are three important points, but nothing more. Now we have to think about the next game," Zidane told the media.
"We are going to try to do things right. It is clear that today is a bad time, but we are going to try to change this."