Gianluca Scamacca struck twice as visiting Atalanta upset Liverpool 3-0 in the first leg of the Europa League quarterfinals. The loss damages Liverpool’s hopes of a treble of trophies in manager Jurgen Klopp’s final season at Anfield. Scamacca scored before halftime, again at the hour mark and Mario Pašalić finished it off. Bayer Leverkusen got late goals from substitutes Jonas Hofmann and Victor Boniface to top West Ham 2-0 and extend its unbeaten streak to 42 games in a season that can also end up with a treble of trophies. Roma beat AC Milan 1-0 at San Siro while Benfica defeated Marseille 2-1 in Lisbon. The second-leg games will be played next week.