Klopp keeps cautious despite Reds' romp

Liverpool boss says his side must 'work like hell' to finish off City

LIVERPOOL - Liverpool manager Jurgen Klopp warned his side will still have to "work like hell" to reach the Champions League semifinals despite taking a commanding 3-0 quarterfinal first-leg lead over runaway Premier League leader Manchester City.

City leads Liverpool by 18 points in the Premier League, but its only league defeat this season came in a 4-3 thriller at Anfield in January, and it suffered an even worse fate on Wednesday to leave its hopes of winning the European Cup for a first time hanging by a thread.