Real Sociedad coach Imanol Alguacil was delighted after their 0-0 draw at Inter Milan.
The result sees La Real finish first in their Champions League group winner.
Imanol said: “I don't think we are aware [of what we have done]. Surely over the years we will realise the great value and merit of this group stage, of having made history once again today in a stadium like this - against an opponent like this.
“We are leaving with the regret of not having been able to win. We are happy we are through, but what we really wanted was to win. I think we played a great game.
“I'm very proud to be here with these guys, I've been with many of them for eight seasons now. I started in the youth teams with many of them and, well, you can't imagine what it means to me to achieve this milestone with them."