The Reds faithful were delighted with the 28-year-old on Sunday afternoon.
And Lucas impressed the Anfield faithful far more than fellow countryman Philippe Coutinho...
Indeed, the 23-year-old has been in rotten form of late and Liverpool lacked creativity again v Southampton on Sunday afternoon.
You can see what Jurgen Klopp is trying to get out of the players on Merseyside but, every time they venture forward, there is usually the same outcome.
Liverpool are suffering from the same problems they have been all year and Klopp will need plenty of time - and transfer-market activity - to sort it out.
But one man who has taken to the Klopp reign already was many people's choice for man of the match against Southampton. Lucas is the in-form Brazilian at Anfield right now and the 28-year-old has kept things ticking in the middle of the park under Klopp so far.
Here's how fans reacted to Lucas's display on Twitter. If the Reds' more creative players can put in a similarly effective performance, the Kop will be celebrating wildly in no time!
On the way back from the #lfc game. First thought: I'd like to think Lucas doesn't have to prove himself to anyone else.— Dave Phillips (@lovefutebol) October 25, 2015
Lucas does his job very well, can't point fingers at him.Can appears in moments but not consistent enough.Henderson desperately needed #LFC— Mohammad Hammoudeh (@Hammoudeh201) October 25, 2015
Thought Lucas and Moreno were excellent and fulfilled their roles well. The rest were varying between meh and dreadful. Subs did okay. #LFC— Issam LFC (@Issam_LFC) October 25, 2015
Lucas Leiva absolutely bossed it today, Man of the Match no question. #LFC— Neil Bason (@neilbason) October 25, 2015