The Brazilian is already a cult hero at Anfield following a productive 10-year spell on Merseyside which delivered 346 appearances.
He departed the club in the summer of 2017, with fierce competition for places leading to him joining Lazio.
With Lucas now based in Rome, but retaining strong ties to Liverpool, the 31-year-old has revealed that he intends to join the away support at Stadio Olimpico on May 2.
He told the Reds’ official website: “I’m still thinking about it, but I’m hoping I can go to the Liverpool end and watch the game - and maybe take some of my friends and my son.
“We still follow Liverpool a lot, we watch every game and I hope they can get to the final.”
While planning to take in the live experience when Liverpool travel to Italy, Lucas will be among the interested observers watching on from afar when his former club face Roma at Anfield on Tuesday.
He added: “It will be a great night, for sure. For the players, a good experience.
“I’m looking forward to it and I’ll be supporting Liverpool for sure.”
Lucas believes Liverpool are capable of making their way to another Champions League final, but has warned that his domestic rivals at Roma are in buoyant mood following their stunning quarter-final fightback against Barcelona – which saw them recover from three goals down to prevail on away goals.
He said: “They are full of confidence of course after the win against Barca.
“Fair play to them because they played really well and I think they deserved it. The boost that gave them is massive.
“But in the city, one side will be supporting the Reds - the Lazio fans - because they don’t want to see their rival going to the final of course, but the other side of Rome is really excited, so it is going to be a big, big semi-final and let’s see what is going to happen.
“I would say Roma is a very aggressive team. They play a Premier League style of play I would say. They press very high and they have some quick players.
“They also have [Edin] Dzeko and he is a big player for them. Liverpool will know him very well.
“We can expect a very good semi-final, but I think Liverpool have all the tools and the power to win because we could see against Manchester City how strong Anfield is.
“Having a good result in the first game could be the key as well for the second game here in Rome.”