The Lions hoped to depart with a morale-boosting victory in the bank, but instead they were issued with a timely reminder of the size of the challenge before them.
Argentina were never expected to roll over, but Lions boss Sir Clive Woodward could not have predicted such a rousing performance from a Pumas outfit which had been denied access to 25 front-line professionals.
It took a Jonny Wilkinson penalty eight minutes into injury time to salvage a 25-25 draw and the overall performance left Corry acknowledging the Lions can only improve.
"I hope the Argentina result hasn't damaged our chances of winning the Test series in New Zealand. I hope we get to a stage where we can look back on this match to see how far we've progressed," he said.
"This game was always going to be tough given the limited preparation we had for it. Fair play to Argentina - they are a good, well drilled side who were especially tough up front.
"Traditionally you get eased into Lions tours with an easier opening match but this wasn't the case for us.
"We had to work hard and I think you learn more from tough games like this than we did from the first match on the 2001 tour when we put a century of points on Western Australia.
"Once we've got over the disappointment of this result we can start building. We will gain from this but there's no hiding the fact a draw wasn't good for us.
"We were incredibly unhappy with the outcome. We wanted to leave on a good note and we would have done that by winning, which didn't happen. The dressing room was very disappointed afterwards."