Pedro Chirivella has told Liverpool's official website he was surprised to learn he would be getting a new contract.
The 18-year-old Spaniard signed an extension which the Liverpool Echo report runs until 2020.
Chirivella signed from Valencia as a 16-year-old, and started the recent FA Cup fourth round game against West Ham United.
Asked about the new deal, if he was taken aback by the club's commitment to him, he responded: "Yes, to be fair. I was just training hard and playing well; when they told me, it was a big surprise for me and I’m really pleased.
"The first couple of years were difficult for me as I tried to adapt to English weather and English football. But I have been here three years now and I feel really good, so everything is going well on and off the pitch."
Chirivella's surprise says a lot about his unassuming nature, because the fact he has been involved with the first team, also in the Europa League, shows he is a player Jurgen Klopp thinks a lot of, and believes can play a part in the future.
The Spanish youth international impressed particularly in pre-season and is an exciting prospect. His chances next year will depend on what Liverpool do in the transfer market, but the new deal should give him some assurance they have a commitment to his development.