Nigge, whose knowledge of Flemington and the spring carnival was honed by her supervision of Americain's three Melbourne Cup preparations, said the horse had lost none of his fitness and his preparation had not been compromised by the problem.
"We'd thought about the Emirates Stakes for him but his work has been really good this week and the Mackinnon really looks like a good race for him," she said on Friday.
Trevieres stretched out during a 1200m canter without any sign of discomfort at Werribee on Thursday, during a session in which the English raider Simenon was the star worker.
Simenon has already proved his fitness and well-being with a third placing in his only Australian start and is on target for the Melbourne Cup.
The Luca Cumani-trained Cup runner Mount Athos also performed strong work with the trainer's wife in the saddle, putting in two strong 1200m gallops.
Of the imports, a slight cloud has settled over French galloper Shikarpour, who is to join the Lloyd Williams stable.
The 4-year-old formerly trained by Alain de Royer Dupre hasn't been on the track since arriving a week ago.
A smaller question mark is also against the name of Godolphin's lone Cup entrant Royal Empire who arrived last Monday and whose only exercise has been a leisurely walk on Thursday.
- AAP