He told Pro Sport magazine in Russia: "It's an absolutely different level of football.
"I'm a leader at Hertha and feel their fans love me but I would like to be a leader in a team which is always fighting to win the Premier League, the Champions League and which have such people playing for them as Steven Gerrard who is a symbol of the city like the Beatles.
"I see no sense in staying in Berlin saying to myself: 'OK, everyone loves me here, why do I need to play for Liverpool?'
"I'd really like a new start there. I have a contract with them for two more years. When I joined Liverpool I knew I could play at such a high level and think I proved it. The rotation of the squad by Benitez really enraged me, but he told me from the start about that and I should have been prepared for it."