Lucas ready to replace Mascherano at Liverpool
The Brazilian midfielder took the skipper's armband for the first time as Roy Hodgson's reign got off to a winning start with Thursday's 2-0 Europa League win against Macedonian side Rabotnicki.
And Lucas, 23, said: "Of course we all hope Javier stays because he is such a good player but we'll have to wait and see.
"I'm not the same player as Javier but I am ready to play and do whatever job the manager needs from me.
"I know I am able play the role Javier does because towards the end of last season I played a few games when he was at right-back."