A track gallop on Tuesday will determine the immediate path for lightly raced stayer Oncidium Ruler.

Trainer Mick Kent says the three-year-old will contest either the Listed VRC St Leger (2800m) at Flemington on Saturday or the group1 South Australian Derby (2500m) at Morphettville on May 9.

“It’s one or the other but it won’t be both,” Kent said. “If he pleases me on Tuesday we’ll run him at Flemington, otherwise we’ll save him for the South Australian Derby.”