Lucas has been discussing the realisation of a 'dream' on Instagram amid speculation he could be headed to Napoli.
The Brazilian made his first appearance for Rafa Benitez's side seven years ago, during a 4-0 victory over Toulouse. Now, the 27-year-old could be set for a reunion with Benitez, as Napoli are said to have agreed a fee for the midfielder to move to Serie A.
Lucas's message, then, could be seen as one of goodbye, with the Brazilian admitting he realised his dream of playing in the 'biggest club competition' for 'one of the biggest teams.'
Liverpool have been drawn against Real Madrid in this season's Champions League but Lucas may not be at Anfield to play a part in the tie.
"Amazing how time flies! Seven years ago, I made my debut in the Champions League," the Brazilian said on Instagram while posting the above photo.
"Since that 4-0 [win] over Toulouse, a lot has happened in my life, but that moment has a special place in my memory.
"I will never forget the day August 28, 2007, when I realized the dream of playing the biggest club competition in the world for one of the biggest teams."
Lucas started the Reds' opening-day Premier League victory over Southampton but was taken off in the second half after what was considered a poor performance.
The following game - Liverpool's 3-1 defeat at Manchester City - the 27-year-old failed to even make the bench for Brendan Rodgers' side.