Eldar Eldarov won the rescheduled St Leger at Doncaster as British horse racing resumed and paid tribute to Queen Elizabeth II.
The world’s oldest Classic had been put back 24 hours and a two-minute silence was observed before racing began.
Jockeys and trainers bowed their heads before a rendition of the national anthem.
“There is an emptiness as we lost a great friend and ambassador in the Queen,” said jockey Frankie Dettori.
David Egan partnered Eldar Eldarov, trained by Roger Varian, to victory in his first ride in St Leger.
Racing resumed in Britain on Sunday, having been called off as a mark of respect following the Queen’s death on Thursday.
The Queen was a leading racehorse owner and breeder, who won the Leger with the filly Dunfermline in her silver jubilee year of 1977.
Chepstow’s fixture also went ahead, while Musselburgh was called off with the Queen lying in state in nearby Edinburgh.
No meetings will take place on the day of the Queen’s funeral on Monday, 19 September.