After seeming to have effected a faster recovery than first expected, Borderlescott could endeavour to win the Coolmore Nunthorpe Stakes for the third consecutive year.
The popular runner of Robin Bastiman's appeared that he would be out for the remainder of the season, subsequently coming back lame after his victory at Glorious Goodwood in the Audi King George Stakes.
Prior to returning to the Bastiman's Wetherby yard, he was conveyed to the Arundel Veterinary Centre, where he received a bone scan and a total examination.
The eight-year-old's connections had hoped that there was a possibility he could have an autumn return to the track in October's Prix de l'Abbaye at Longchamp, but currently he has been given a "50-50" chance of being fit enough to defend his title next Friday at York.
Bastiman said, "His programme was for him to go on the horse-walker for four or five days, but the horse was going mental so we gave him a canter.
"He was so full of himself. Maybe he just tweaked a muscle, who knows.
"He'll be thoroughly checked out. The thing is that was the first day he cantered this morning.
"My son Harvey rode him and the horse unshipped him. He does that when he's really well, so the vibes are that he is well.
"He'll canter again tomorrow and if he's stiff or there's anything there we will know. The horse will tell us.
"He seems OK. It might be too quick, who knows? I'll have a word with the owner.
"He was really lame but they found nothing there. You just go through the motions and he's back firing again. There's nothing there at the moment.
"He'll be blood-tested and if his muscle enzymes are high it will obviously be a no-go.
"It's a day-by-day process with him," Bastiman said.