"That was a different moment. I went to Manchester City in January and we were playing for a place in the middle of the table," said the winger.
"I was 22 but now I have three years more experience and this is very important in football. Since then I have played in a UEFA Cup final and I have played for the national team.
"I am now more prepared to play for a big club like Liverpool and I also know the Premier League.
"I think I am better now. I have made good progress and I want to continue this progress here."