Eto'o scored in the 2-0 victory at San Siro and in a midweek Coppa Italia semi-final win over Fiorentina.
"It was a difficult and tense game, but the important thing is we won and are now awaiting Tuesday's match," he told Inter Channel.
"More than my goal, the key was the hard work of all the team. My goal just gave us that extra bit of security."
Inter now face Barcelona in the Champions League semi and Eto'o added: "Would I celebrate if scoring against Barcelona? Of course I would at San Siro, but at the Nou Camp I wouldn't celebrate in front of my old fans.
"Barcelona are the strongest side in the world right now, but every match is different and we want to write history."