Liverpool star Virgil van Dijk has issued a rallying cry to the rest of the squad, insisting they must step and deliver to ensure Jurgen Klopp gets his dream farewell. The German stunned the footballing world on Friday when he confirmed he’d be walking away from the dugout at the end of the season. Klopp has guided Liverpool to the top of the Premier League table so far this term, with the Reds five points clear of defending champions Manchester City. And Van Dijk wants the squad to step up and ensure the 56-year-old leaves on a high note come the summer. “I think how we always try to manage n…