On pure aesthetics, Liverpool and Manchester City have forged a rivalry to send purists weak at the knees. The 2-2 draw they produced 19 months ago was widely feted as a high-water mark in English football, with Jurgen Klopp and Pep Guardiola, fresh from a final-whistle embrace, ladling honeyed tributes on each other in their post-match press conferences. But the less palatable truth is that away from the blossoming managerial bromance, and the friendships on the pitch, these are two clubs bound