Hong Kong's 4-year-old Classic series concludes with the running of the HK$24-million BMW Hong Kong Derby Sunday at Sha Tin Racecourse, and while no one will confuse any of the 14 runners signed on for Horse of the Year Golden Sixty (Aus) (Medaglia d'Oro), who became the second to sweep the series in 2020, or last year's winner Romantic Warrior (Ire) (Acclamation {GB}), who has gone on to multiple Group 1 victories in unrestricted company, it is a race that--in theory--is wide open. Voyage Bubble (Aus) (Deep Field {Aus}) was...