LONDON: Manchester City took a huge step towards the Premier League title with a vital victory at rivals Manchester United.Chelsea’s title defence looks all but over after a miserable loss at West Ham United, while Wayne Rooney’s first Merseyside derby goal earned Everton a draw at Liverpool.Here are five things we learned from the Premier League this weekend:GHOSTS IN MACHINE FOIL MOURINHO’S BID TO SPOOK CITYJose Mourinho set his stall out nice and early ahead of the Manchester derby. The days leading up to the game were accompanied by a familiar drip-drip-drip of jibes – about City’s alleged propensity for diving and “tactical fouling” and opposite number Pep Guardiola’s right to wear a ribbon in support of Catalan separatists – in a bid to get inside his opponents’ heads.His tactical approach was familiar, too – a back four, two midfield scrappers and four quick players on the break. But the tried and tested Mourinho formula was fatally undermined by set-piece sloppiness, with Romelu Lukaku particularly culpable, that enabled City to pull off a 2-1 win and move 11 points clear at the head of the table. Mourinho was left to fall back on another similar tactic – blaming the referee, in this case…