Harry Herbert has cautioned that unless the ground conditions are suitable, Harbinger will not be a starter in the Juddmonte International at York this month.
Following his annihilating King George VI And Queen Elizabeth Stakes victory, subsequently becoming the highest rated horse around the world, his connections shone the spotlight on the Knavesmire Group One, as his next possible step on the path to the Prix de l'Arc de Triomphe.
Nonetheless, to have the colt supplemented for the event would be at a cost of Â£50,000 and Herbert, stated track conditions would be have to be correct if he was to line up on August 17.
Herbert said, "I've been talking to Sir Michael and we just thought it was important to let everybody know that Harbinger would not be supplemented for York unless ground conditions were suitable for the horse.
"If it was very fast ground he wouldn't run and if it was fast ground come supplementary day and it looked like it would be too quick for him, then obviously that would be a non-starter.
"The horse seems in great form, Sir Michael is very pleased with him and the plan is very much to run there, but the ground must be suitable."