AN unraced Dubawi three-year-old half-sister to Group 2 Great Voltigeur Stakes winner Centennial emerged as the star lot as the 2017 sales season at Ascot got underway on Thursday.

She, Lost Diamond, is also a half-sister to the stakes winner Siren’s Song and their dam, the Group 2-placed Lure mare Lurina, is a half-sister to Group 1 winner and sire Croco Rouge and to the outstanding broodmare Alidiva, the dam of no fewer than three Group 1 winners in Taipan, Ali-Royal and Sleepytime. The latter won the 1000 Guineas and is the dam of a pair of group-winning sons.