By Jon Lees Fans of City Of Troy could not believe their eyes when the superstar colt flopped in the 2,000 Guineas. And they’ve shown they don’t believe the real City Of Troy performed at Newmarket by shelling out again on his Derby prospects. City Of Troy ended last year unbeaten in three starts to be crowned champion two-year-old of Europe. During his winning campaign trainer Aidan O’Brien said he was the best two-year-old he had ever trained. And connections voiced the hope that he could develop into ‘our Frankel’, the world champion racehorse who went undefeated in 14 starts. But in the 2,…