Frankie Dettori will make a late decision on whether Gregory or Arrest will be his final ride in Saturday’s Betfred St Leger at Doncaster.
Both horses are trained by John and Thady Gosden, with Dettori having partnered ante-post favourite Gregory to win the Queen’s Vase at Royal Ascot and finish third under a penalty in the Great Voltigeur Stakes at York last time.
Dettori, who is planning to retire at the end of the year, was also aboard Arrest when he won the Chester Vase on his seasonal bow, with the Juddmonte-owned colt providing his last Derby ride when coming home a disappointing 10th at Epsom.
The pair then regained the winning thread when stepped up to just shy of the St Leger trip in the Geoffrey Freer at Newbury on his latest run.
Conditions at Doncaster could be key to Dettori’s pick, with Arrest at his best with cut in the ground while Gregory has yet to run on any worse than good going.
The ground on Town Moor is currently described as soft, with Dettori planning to make his call in the morning ahead of final declarations at 10am.
He said: “I’m looking forward to it and it’s a race that has been good to me in the past, hopefully long may it continue.
“I’ll decide who I ride in the morning, let me sleep on it.”
Dettori will be bidding for a seventh St Leger success, having last struck aboard Logician in 2019.