Lucky Leads York Field Royal Ascot winner I'm So Lucky and Haydock third Star Of Light are disputing favouritism for tomorrow's 47th John Smith's Cup at York.The Mark Johnston-trained I'm So Lucky was a game winner of the Wolferton Handicap at last month's Royal meeting while Brian Meehan is handing a quick reappearance to Star Of Light after he finished third in last week's Old Newton Cup.Coral make the pair 7-1 joint-favourites for the 10-furlong event which has attracted a maximum 20-runner field.Richard Fahey's Mutawaffer and William Haggas' Hopeful Purchase have been declared as reserves.Forgery, trained by Gerard Butler, was an impressive winner of the ultra-competitive Spring Cup at Newbury earlier this season and acquitted himself well when seventh to Cesare at Royal Ascot last time.He is currently an 8-1 chance to win the Knavesmire feature, which went to Aidan O'Brien's Mullins Bay last year.? PA Sport