Punters were floored and trainer Chris So Wai-yin was in shock when dirt specialist Sing Dragon bagged a blowout victory at $105.25 in Sunday’s Class Two Albert Handicap (1,200m) at Sha Tin. In what could stand as the biggest upset of the entire season, Sing Dragon kept on strongly on the pace under Matthew Chadwick to prevail in a thrilling finish, beating fellow dirt performer Victory Sky by a short head. Sing Dragon has won five races on Sha Tin’s all-weather surface but had never been placed...