Benitez cagey over Liverpool future
Asked about British media speculation that he was considering quitting, the Spaniard, who took charge of Liverpool in 2004, said: "It's a fantastic night and I am not considering resigning.
"I will keep working and trying to win games and will talk to the owners in the future. I think my lawyer was talking with the owners today but we'll speak in the future."
It was a proud night for Benitez as he returned to his hometown and the club where he started out as a manager to register a victory.
Yossi Benayoun headed Liverpool's winner from a freekick eight minutes from time after a tense tactical battle at the Bernabeu.
The return leg is Anfield on March 10.