Jurgen Klopp hailed his Liverpool players in the Nou Camp, calling it “their best away Champions League performance” despite losing 3-0 to Barcelona. Lionel Messi scored twice to put Barcelona in pole position of their Champions League semi-final but Liverpool controlled large periods of the clash, recording 15 shots on goal.Barcelona vs Liverpool player ratingsMessi’s 600 milestone in statsJames Milner, Roberto Firmino and Mohamed Salah all went close for the unfortunate Reds, who lacked Barcelona’s killer instinct in front of goal. “It’s OK to lose away in the Champions League as long as you score a goal, we didn’t and that’s a problem,” Klopp said.”That makes our life not easy. My boys gained a lot of respect again for the way they played and how they’ve developed. I had so much fun watching that game but we lost it. That’s not fun. But I’ve been in this business for a long time and I have learned to accept.”Match reportAs it happenedHe added: “These boys never give up. I love that. But there’s no party in that dressing room. We will use the game to show the boys how important it was for their development. I really think it was the…