Liverpool coach Juergen Klopp called on his side to stay completely alert after their 2-0 Champions League semi-final first-leg win over Villarreal on Wednesday, insisting the scoreline could give a false impression. Liverpool dominated from the start at Anfield, with two quick-fire second-half goals putting them on the verge of a third Champions League final in five seasons. Klopp, however, who has won all four of his home Champions League semi-final matches as a manager with Borussia Dortmund and Liverpool -- seeing his teams score 15 times while conceding three -- insisted the job was not done yet.