By Andrew Both SHANGHAI (Reuters) - Rory McIlroy enjoyed one of his best rounds of a disappointing season to storm into a two-shot lead over a star-studded field at the $8.5 million WGC-HSBC Champions tournament on Thursday. Displaying a deft short game with a new lob wedge, McIlroy reeled off eight birdies en route to a first round seven-under-par 65 at the World Golf Championship event in Sheshan. Spaniard Gonzalo Fernandez-Castano and Welshman Jamie Donaldson are tied for second on five-under, one ahead of a group of four players that includes American prospect Jordan Spieth and Briton Justin Rose. More...