The Argentine has become a regular member of manager Rafa Benitez's first team and believes the club have improved considerably in the years since he arrived.
"In the past three or four seasons Liverpool have lost the league maybe in December or January but this time we are there right at the very end of the season and we still have a chance so this is very important," he added.
"Our job now is to continue to work hard and to improve because we have shown that we can win against the biggest teams."
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