Jurgen Klopp is leaving Liverpool at the end of the season. The German will leave Anfield this summer, and the Reds have a massive job on their hands when it comes to finding a replacement for the former Borussia Dortmund man. Klopp is one of the greatest managers of all-time, and whoever replaces him will have big shoes to fill. At the moment, it looks as though Xabi Alonso is the frontrunner for the job, but a few years ago, it looked as though another former Liverpool midfielder would be in the mix. Indeed, Steven Gerrard looked to be a coach on the up a few years ago, and even Klopp himsel…