By Chris McKenna Sheffield United were all in yellow but Alexis Mac Allister’s stunning strike ensured the Blades were no banana skin for Jurgen Klopp’s title-chasing Reds. This was job done even if there was a little scare. Liverpool ticked off another win and moved a step closer to a 20th English league crown as they moved back to the summit. Their rivals Arsenal and Manchester City won’t have been holding their breath for a slip up here in the race against the Premier League ’s bottom side. But it was a cock-up from Blades keeper Ivo Grbic which gifted the hosts the lead at Anfield in the 1…