Adam Lallana will leave Liverpool as a free agent at the end of this season after manager Jurgen Klopp sanctioned a short-term contract extension for the midfielder to "finish the job" of delivering the Premier League title to Anfield.

Lallana's contract was due to expire at the end of June, but Liverpool have confirmed that the 32-year-old has now signed a deal that will keep him at the club until the end of the 2019-20 season.

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Despite injuries during the latter part of his Liverpool career, Klopp said Lallana, who arrived from Southampton in June 2014, deserves the chance to share in the club's imminent title celebrations, with the team needing just six points from nine remaining games to win the league for the first time since 1990.

"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," Klopp told the club's website.

"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.

"Adam always puts the club first -- always. In the conversations we have had, he has been the first to express that my priority as a manager needs to be the players who are at this club for longer than just the rest of this season.

"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."

Lallana has started just three league games this season, coming on as a substitute on 12 occasions, and said his role is likely to remain as a squad player in the final weeks of the campaign.

"The gaffer has been different class and we've had an honest conversation about what my role will be in the remaining weeks," Lallana said.

"I want to contribute in the most positive way possible that helps him and the team, not just for the remaining matches of this season -- but also what they'll need to consider for next.

"I'm totally at peace with what that looks and feels like, and I know the role I'll be playing for this team will help in what's going to be an extraordinary period -- the likes of which none of us have ever experienced.

"I feel in my time at Liverpool I've always looked to do the right thing for the team, the manager and the club in every decision I've made. I think this one fits into that category as well, so I'm buzzing to be seeing out this campaign and hopefully get to celebrate something memorable with an amazing group of people."