Liverpool manager Jurgen Klopp insists he will not underestimate “world-class” Villarreal boss Unai Emery ahead of Wednesday’s Champions League semi-final first leg. Liverpool’s hunt for an unprecedented quadruple continues this week when they welcome a Villarreal side to Anfield hoping to make history under head coach Emery by reaching their first Champions League final. Having defeated Manchester United to win the Europa League last season, Villarreal’s success in Europe has continued this campaign with impressive victories over Juventus and Bayern Munich. Villarreal may go into the last-four clash as heavy underdogs but Klopp, who lost out to Emery’s Sevilla in the 2016 Europa League final, has vowed not to overlook the threat posed by the former Arsenal boss. Image: Unai Emery’s Villarreal knocked out Juventus and Bayern Munich in this season’s competition “Of course, we did a proper analysis of them,” Klopp said. “I had a lot of respect for Unai Emery and Villarreal be...