Diamond Necklace heads the stellar field for the Group One <em>Sumbe Prix Jean et Louis Romanet</em> at Deauville, aiming for her fifth top-level success. Aidan O'Brien's filly has won all six starts, including the Nassau at Goodwood. Rebel Moon, ridden by Dylan Browne Mc Monagle, is a contender after a fourth in the Irish Oaks. Aventure, last year's Prix Vermeille winner, is a key rival for Christophe Ferland. At 2.50pm, Orthodox and Man's Best Friend clash in the <em>Sumbe Prix Morny</em>, with Ryan Moore backing Man's Best Friend, who won the Richmond Stakes. Great Barrier Reef and Senorita Bonita are also in the mix.

The Brighton Summer Series Final at 3.50pm features Arnaz, seeking a hat-trick, with Diomed Spirit and Big Time Rascal as each-way chances. Prefer The Sister is a top-weight contender. Shorter races include Dee's Funny Girl in Deauville's <em>Prix du Calvados</em> and Sea Suite in Brighton's Class Four. Santorini Star and Defiantly are popular in the <em>Prix Kergorlay</em>.