Liverpool boss Jurgen Kopp says his side have to be "their best selves" to overturn a deficit in the second leg of their Champions League quarter-final against Real Madrid on Wednesday.
Real won 3-1 in Spain last week, meaning Liverpool need to win by at least two goals at Anfield to advance.
"When you're 3-1 down, it looks like we're already out so we have nothing to lose and will try," said Klopp.
"To beat Real Madrid you have to defend at your highest level and also create."
Liverpool have reached two Champions League finals under Klopp, losing to Real in 2017-18 before beating Tottenham in 2018-19.