Aidan O'Brien is set to compete with a trio of horses in the Betfred St Leger at Doncaster, aiming for his eighth victory in the historic race. The lineup includes Illinois, who won the Queen's Vase and finished second to Los Angeles in the Great Voltigeur, Jan Brueghel, unbeaten with a recent win at Goodwood, and Grosvenor Square, who showed significant improvement with a 20-length victory in the Irish St Leger Trial. Illinois will be ridden by Wayne Lordan, as stable jockey Ryan Moore is occupied elsewhere. The competition features notable entries like the Irish Oaks winner You Got To Me and David Menuisier's Sunway, partnered by Christophe Soumillon. With seven runners declared, the stage is set for a thrilling conclusion to the classic season in horse racing.