Liverpool are back in action tonight for the first time since an impressive display against Manchester City on Sunday. 5-1 up from last week’s first-leg, the Europa League match with Sparta Prague should be a little less intense. Truly though, given the way Liverpool attacked City during the second-half last weekend, anything would be. Without a number of first-team players, few had expected the Reds to take the game to the champions quite so readily. Certainly not Fulham midfielder Tom Cairney, who told the BBC Players Channel that Liverpool had ‘surprised’ him. “I was surprised second-half b…