Real took the lead through Raul in the 39th minute but Almeria managed to fight back and earn a 1-1 draw.
Robben said: “I am upset about the result. We had our chances but we could not finish them off. What a shame.
“Now we have two days to prepare for Juventus. We have to beat them any which way we can. We cannot afford to give them any options of leaving with points in hand.”