Stan Collymore branded Liverpool “uncharacteristically sluggish” as they limped to a 1-1 draw against Leicester City on Wednesday. Sadio Mane gave the Reds a dream start after netting just three minutes into the clash, but a defensive error from Andy Robertson allowed Foxes defender Harry Maguire to put his team on level terms with the hosts. The former Liverpool forward seemed far from impressed by their display, adding how he could not “relax” until his old team opened up a…