"In the first half we had one opportunity to score and we took it," said Corry following the 22-11 defeat in his club-record 62nd Heineken Cup match.
"In the second half we had a period of sustained pressure and did not get anything. Coming to places like this, it was always going to be tight and you need points from your sustained pressure. A couple of times we did not do that."
Tigers' remaining fixtures are against Edinburgh (away) and Leinster (home) in January.
"The problem is that it is out of our hands now," said Corry. "We know what we have still got to do to stay in the mix. We can only focus on our task and that is to win our remaining two games.
"We will be very critical of our performance when we sit down and look at it. That is the kind of people we are, but we still look for ways to put it right and learn from that.
"When we got it right and started to play, we looked very good. Unfortunately, we did not control possession and take our chances in the second half that could have made the difference."