Liverpool were forced to fight tooth and nail to get three points against Sheffield United this evening. In some quarters tonight’s game had been billed as a straightforward three points. But this is the Premier League, nothing is ever easy. In truth, it started ominously right from the first whistle. Liverpool really should have been behind inside a minute, but Caoimhin Kelleher superbly kept out James McAtee’s back post effort. From there, the Reds improved, with Darwin Nunez in particular being a menace. But after Nunez got a fortuitous opener, Liverpool went to sleep. Having seen his team …