Real Madrid manager Zinedine Zidane could not hide his disappointment after his side were beaten 2-1 by Celta Vigo in their Copa del Rey quarter-final first leg on Wednesday.
The shock defeat at the Bernabeu was Real's second on the bounce after they lost by the same scoreline to Sevilla in La Liga on Sunday.
Los Blancos found themselves behind to a 64th minute Iago Aspas goal, before Marcelo equalised with a fine volley just five minutes later.
However, after drawing level, Real Madrid seemed to switch off completely and were hit with a brisk counter attack to find themselves behind again and Zidane lamented the lack of mental strength shown by his players.
"I don't know what happened but once again we didn't concentrate enough and didn't get into the game," he said.
"It's a bad moment but we have to get over it. We have a second leg to turn it around but today was a bad game.
"Losing is always a possibility but the way we started the game is what annoys me the most because you know if you let the other team play they can cause you problems and that's what happened.
"I am not worried. It is not a good moment for us, two defeats [in a row], but we can overcome this. We still have the return leg to go.
"Losing 2-1, the result is not in our favour, but we know we can go there and change that."