The 33-year-old signed a one year contract with the Blues last summer, and is set to become a free agent in the summer unless Chelsea move to extend the deal.
Eto’o spent two years at the San Siro where he played under current boss Jose Mourinho, enjoying tremendous success, being a part of the 2010 treble winning side.
The striker – who has scored 10 goals in all competitions this season – has refused to rule out the possibility of returning to the Italian giants, despite a change in the presidency since his last spell.
“If (Massimo) Moratti calls me, why not?” he told Sky Sport Italy.
“I know that Inter has a new president (Erick Thohir) but Moratti is still there.”
Eto’o continued his habit of scoring important goals with the opener against Galatasary on Tuesday evening, setting the Blues up for a 2-0 win on the night and a 3-1 win on aggregate.
The game marked the return of Chelsea legend Didier Drogba, and Eto’o said the Ivorian fully deserved the reception he got from the supporters.
“We made the match easy because we scored early,” he added.
“I was very happy for Didier Drogba with the welcome of the fans as he achieved so many nice things here. I wish him the very best.”
Asked who he would prefer to face in the last eight, Eto’o replied: “Barca, Real or PSG, even if I am Parisian, I will have to defend Chelsea colours and get through.”