The midfielder has endured a torrid time with injury problems at Anfield, but claims he is back to his best after a positive start to pre-season
After missing the majority of 2011-12 with an anterior cruciate ligament injury, the Brazilian picked up a thigh problem at the beginning of last campaign that ruled him out for three months and claims he is only now returning to full fitness.
"I'm feeling 50-60% better than I was last season," he told the club’s official website.
"The last six months I played were really important for me. I needed to get games and sessions, and this season now I'm feeling strong and feeling that I'm in the shape I was before the injury.
"Now I've got to improve the fitness and build confidence, but I'm really happy with the way pre-season has started."
The 26-year-old was voted the Reds’ Player of the Season after his previous injury-free campaign in 2011, but has made just 38 Premier League appearances in the two years since then.