The Wertheimers' sensational Deauville August Festival continued apace on Sunday as their star mare Aventure (Sea The Stars) take the honours in the G1 Sumbe Prix Jean et Louis Romanet.If the market was to be believed, the unbeaten Diamond Necklace (St Mark's Basilica) needed only to turn up to collect but her flat finale paved the way for the Christophe Ferland-trained five-year-old to capitalise.Enjoying a perfect ground-saving trip under cover, the 7-1 shot who had captured last year's Prix Vermeille was launched by Maxime Guyon approaching the final furlong and soon had the measure of Ballydoyle's 2-5 favourite en route to a comprehensive two-length success. Diamond Necklace held on to second by a head from the outsider Timeforshowcasing (Showcasing).“Back to her brilliant best!” AVENTURE springs a surprise in the Prix Jean et Louis Romanet, defeating 2/9 favourite Diamond Necklace… pic.twitter.com/8S8DUdV98z— At The Races (@AtTheRaces) August 23, 2026The post Aventure Downs Diamond Necklace In The Romanet appeared first on TDN | Thoroughbred Daily News | Horse Racing News, Results and Video | Thoroughbred Breeding and Auctions.