The Brazilian committed his future to the Reds on Tuesday in Evian during his team's pre-season training camp ahead of the 2021-22 campaign.
Gearing up for his fourth season at the club, the No.3 wants to offer even more for Jürgen Klopp's side in the search for silverware.
He told Liverpoolfc.com: "In my game I have improved, I think I'm a bit more experienced now and now I'm 27 – I arrived at the club [at] 24.
"When you play on this level, of course it's natural you will grow, you will learn a lot of things.