The Uruguay striker took his Premier League tally to 19 in 12 games with two goals in the 3-1 win over troubled Cardiff at Anfield which took the Reds above leaders Arsenal - for another day at least.
Suarez signed a long-term contract on Friday - reportedly worth £175,000-a-week - and Lucas says he deserves every penny.
"What he is doing this season and what he has done in the past few seasons he deserved that," said Brazilian Lucas of his fellow South American.
"We can see he is really comfortable playing here. It (the contract) is a positive message because the owners and manager said they want to keep their best players and at the moment he is not only our best player but the best player in the league.
"Hopefully he will maintain this form for a long time for the club."
If Arsenal fail to beat Chelsea on Monday, Liverpool will go into their Boxing Day clash with Manchester City top of the league.
The last four teams to occupy that position went on to win the title but even with Suarez in the form he is Lucas insists they are taking nothing for granted.
"We are top of the league until Monday. It is good to be there, it gives you a lot of confidence," the Brazil midfielder told LFC TV.
"We just go game by game. We know our main target is to play Champions League again and every week we are improving.
"If we keep the same mentality playing as a team I think we will have a good season and a positive one.
"We go into the next two games knowing they are crucial but with a lot of confidence, especially after winning four games in a row."