Liverpool can be optimistic about their chances to inspire an unlikely comeback against Atalanta due to two reasons. Liverpool have been here before. It’s not the first time Jurgen Klopp’s side has been down after the first leg in a European knock-out match. Over the last few seasons, Klopp has run into similar situations before, most notably against Spanish clubs (Real Madrid twice in 2022/23 and 2020/21 and Atletico Madrid in 2019/20). The one everyone remembers, though, is the magical Anfield night against Barcelona. To this date, that is the only time Liverpool were able to overturn a defi…