Sir Gino has been ruled out for the rest of the season, trainer Nicky Henderson has announced.
The five-year-old was forced to miss an intended run at Newbury on Saturday with what was described as a “small wound” on a hind leg, but that injury has now become infected and Sir Gino is being treated in an equine hosptial.
In a statement on X, Henderson said: “Unfortunately Sir Gino’s situation has deteriorated somewhat and he has been admitted to the equine hospital.
“As a result of initial examinations at Donnington Grove, an infection has invaded the ligaments in his near hind leg.
“This will require lengthy treatment that will sadly rule him out of any further racing this season.
“This is a dreadful blow to Joe and Marie Donnelly and everybody at Seven Barrows, but we will be doing everything possible to help this incredible bright light back to full fitness next season.”