The attacking midfielder suffered badly with injuries throughout his time at Anfield...
“Not being involved, I have been there myself. It’s hard to manage your own ego at times."
Let's take a look at every club's biggest transfer loss, with at least one of these set to be broken soon.
"If he was injured less he'd have been on another level. One of the best I've worked with."
"People will point to last season and suggest he was not as good for Liverpool. That really irritates me..."
The Reds lost 2-0 to Atalanta on Wednesday night, leaving them only two days recovery in between matches.
Lallana reckons his former boss will "love" the "test" of winning matches with a depleted squad.
The summer transfer window was only open one day before Brighton swooped.
The 32-year-old was signed by former Liverpool boss Brendan Rodgers in 2014 from Southampton.
Adam Lallana has penned an emotional farewell message to Liverpool with his six-year spell coming to an end.
Not everyone on this list will leave this summer. But for a variety of reasons, they would not be missed.
He might well have been exaggerating but you can see why Klopp called Lallana a Liverpool "legend".
Adam Lallana will not pull on a Liverpool shirt again as Jurgen Klopp keeps him fit.
Their PPG is through the floor. Juan Mata, Pedro and other players who are a curse...
Adam Lallana will get the chance to finish the job off with Liverpool after agreeing a short-term contract extension.
Lallana is out of contract in the summer after spending six years at Liverpool following his 2014 move from Southampton.
"If you go back five years you'd be looking to bring Lallana in." Did Klopp inherit him too late at Liverpool?
Liverpool could alter their clear-out plans in order to avoid going into the transfer market this summer, according to reports.
Leicester and Lazio are among the clubs to have been linked with the Liverpool midfielder.
With money set to be tight this summer, here are 13 stars who wouldn't cost a transfer fee...
"There is a player out there that could be far more influential than Mohamed Salah."
Lallana is out of contract in the summer after spending six years at Anfield following his 2014 move.
Roy Keane managed to poke fun out of one Liverpool player in the build-up to Chelsea's win over Everton.
The Mailbox kind of feels for Jose Mourinho. As for Liverpool, Fabinho cannot possibly play against Atletico.
Lallana insists there is "nothing going wrong" at Liverpool.
Adam Lallana's representatives have reportedly been approached by Leicester over a possible summer move.
"I have been aware of his talents since he was a young player at Southampton."
Liverpool have been linked with summer moves for the likes of Jadon Sancho and Timo Werner...
Leicester are reportedly frontrunners for Lallana.
There will be lots of interest in Lallana in the summer with his contract expiring at the end of the season.