The midfielder has been impressed with his compatriot's form of late and believes he has the makings to continue finding the back of the net until the end of the season
Firmino found it difficult to make an impact at the start of the campaign following his summer move from Hoffenheim, but has started to sparkle under Jurgen Klopp's tutelage.
The 24-year-old has scored seven goals in his last eight Premier League appearances and also found the net in Liverpool's 2-0 Europa League victory over arch-rivals Manchester United on Thursday.
And Lucas says his fellow Brazilian can play a big part in helping the resurgent Reds finish the season off with a bang.
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"He feels very confident and you can see in every game he is a threat," Lucas told the club's official website.
"He looks like he’s going to score in every game. I hope it stays like that.
"He feels very happy here, he’s very settled and his family is doing well.
"There is no reason for him to not perform. I think he has been a big player for us already."