Lallana has committed to the end of July in order to see out the extended season.
Klopp said, “I know how highly sought after Adam is in this moment by other clubs who want him for next season, so for him this is a commitment to us and we are very appreciative to him for it.
“This is absolutely how it should be, too, because I am so pleased he will be with us to finish the job this season and have the farewell he deserves so much.
“It is not possible for me to find words in the English language to properly explain the importance of Adam Lallana during my period of being manager of this club.
“But, to be honest, now is not the time for these words. Because of this news – that he stays until we finish this campaign – I can say all the things I want and need to when our season is concluding next month.
“He wants to be here to finish the job and do it properly, but it says everything about him that his biggest concern was blocking the progress and opportunity of a player who is under contract for next season also.
“But his role is too important to lose him before this season is done. So, it's fantastic we can delay our messages of gratitude and good luck until the end of July now."