Back from suspension, Hector came off the bench to head home in the 3-3 draw with Hertha Berlin.
Eintracht coach Niko Kovac smiled: "That's football. Twice sent off, now he scores the decisive goal to compensate. It's nice. Anyway, we are all happy."
Hector also remarked: "An incredible feeling to have scored a goal. My first in Germany. A great cross, I just had to dive. We have done a good job after the break, two goals conceded. But we came back."
He added: "Chelsea's people have been supportive. They know I had to adjust to things here."