Hong Kong-based Zac Purton was called before stewards to explain his ride on Japanese stayer Fame Game in the Caulfield Cup.
Racing Victoria stewards had concerns over Purton's ride from the 800m mark of Saturday's race and his alleged lack of vigour over the final 100m.
Stewards, through an interpreter, questioned Fame Game's trainer Yoshitada Munakata over his instructions to Purton.
Munakata told stewards the instructions given were from barrier one to get back, not to go too wide and to ride between horses. "This horse tries harder between horses," Munakata said. He said the horse had travelled from Japan to win both the Caulfield and Melbourne Cups.