The Spanish striker capped a magnificent debut campaign in the Premiership by scoring his 24th goal of the season in Liverpool's 2-0 win at Spurs on Sunday.
He told the Liverpool Echo: "The supporters back the players, regardless of who is out on the pitch.
"The fans get behind the side even when things are not working out, and they are always there until the death.
"That is the major difference with football back in Spain. If a team is not doing well, then it is because the players do not deserve to be wearing the club's colours.
"At Liverpool, if a player is wearing their shirt, it is because he deserves it. The fans ask for effort and dedication, and their support is something special, something that stays with you."