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A sell-out is expected for the clash of two of Europe's biggest teams and O'Connor is fully aware of the task which lies ahead of the Tigers.
"It should be a good game," he said.
"They have been one of the form teams of the Heineken Cup so far.
"We are under no illusions about how tough a task it is going to be to get a result there.
"We have already had a little look at them and they rely on Johnny Sexton to kick them into the right areas and are pretty clinical when they get the opportunities.
"It's up to us to manage those opportunities they may get and make sure that we are good enough to nullify those chances if they come."
