LIVERPOOL, April 17 — Jurgen Klopp was headed for a glorious send-off in his final season at Liverpool just a few weeks ago, but talk of a potential quadruple is now long forgotten as the Reds have come off the rails.

Liverpool have a mountain to climb if they are to make the Europa League semi-finals on Thursday after losing the first leg of their last-eight tie at home to Atalanta 3-0.