Fortune had to be flown home on a spinal stretcher and was visited in Salisbury Hospital by his wife Jan today as he awaited the results of a scan on the injury.
Fortune's agent Tony Hind said: "Something in his lower back has been troubling him for the last couple of weeks and it's just gone. We hope it's nothing serious, but not even the surgeons seem to know what it is."
Latest Irish Champion Stakes betting (Cashmans): 11-10 Alamshar, 3 Falbrav, 7-2 High Chaparral, 10 bar.