Old Trafford was a place full of grumbling Manchester United fans at half-time today as Liverpool entered the break 2-1 up. Man United were left shellshocked really as two goals in quick succession from Alexis Mac Allister and then Mo Salah ensured Liverpool held the lead at half-time. For Liverpool, it was a arguably more than they’d deserved. The Reds had been nowhere near their best. However, that didn’t stop the Liverpool fans giving the United fans some stick as soon as Mo Salah scored the second goal. Liverpool fans mock Manchester United fans at Old Trafford Of course, the rivalry betwe…