Rawiller rode the imported stayer to win the Dato Tan Chin Nam Stakes at Moonee Valley and was due to be replaced by Damien Oliver for Saturday's A$500,000 Turnbull Stakes before Oliver copped a suspension.
Rawiller was in the saddle on Saturday, but Oliver is expected to take over the ride for the Cox Plate and Melbourne Cup.
Waterhouse has intentions of increasing her presence in Melbourne and it is believed Oliver will be her go-to jockey.
Fiorente finished only fourth in the Turnbull, but he was just a head, a head and a nose from $30 upset winner Happy Trails and his effort to flash home late was easily the run of the race.
New Zealand mare Silent Achiever finished close up sixth, not much more than one length from the winner.
Sangster dropped away and finished at the tail of the field.
Sir Andrew poked his nose into the high rankings of early-season 3-year-olds, when he flashed home to down favourite All Decked Out in Saturday's $85,000 DHL Hawkes Bay Guineas.
Trainer Richard Otto has had a huge opinion of Sir Andrew since before he began his career and the finish the gelding produced on Saturday makes that confidence well placed.
Otto thought enough to declare the Caulfield Guineas as a possibility and Sir Andrew does not hold a nomination for the 2000 Guineas at Riccarton.
All Decked Out was beaten, but he gave the impression he is still learning his craft and plenty can be expected from his natural improvement going forward to the 2000 Guineas.
He looked lost when he went to the lead early in the home straight and was a sitting shot when Sir Andrew came alongside with his powerful finish.
Fascination Street did an excellent job for a filly to finish third.
She looked the winner when she challenged rounding the home turn.
Gary Alton can take a bow for producing unsound crock Historian to win the $70,000 Tumu Spring Sprint on Saturday in his first start since March and Historian can take one as well.
There was not a more gallant finish anywhere than the one Historian produced to keep Neo at bay down the length of the home straight.
"He's hardly had a saddle on him since he last raced," said Alton, "but I knew he was close to his best."