A hit-and-run mission as a fill-in was a lucrative one for familiar face Craig Williams as the Aussie jockey teamed with countryman John Size for one win before denying the trainer another with victory in the last, reports Racing Post HK.

Williams, who was based at Sha Tin for more than three seasons full time from 2002-03 and has been a regular visitor on feature race days ever since, answered a call for help from Jockey Club officials to bolster numbers as the riding roster was cut into by mid-season departures and suspensions.

After winning on the Size-trained debutant Amazing Kids, Williams later scored on Multivictory in the last for trainer Tony Cruz, beating Size's race favourite Eroico into second.

"It's always an honour to ride here in Hong Kong and I'm grateful for the chance and it was even better to get a couple of winners," Williams said.

Three-year-old Amazing Kids is blessed with obvious natural speed, but after drawing wide and mindful of the fact the exciting prospect had never raced right-handed, Size instructed Williams to "assist" the horse around the bend.

"He was still a bit awkward," Williams said after a half-length win. "He is just starting out and he got a bit unsettled in the gates, he got a little bit unbalanced on the turn and he drifted in on the home bend under pressure. But once I was able to switch hands with the whip and gave him a smack he straightened up.

"He is a very competitive horse and he really wanted to be in front. He feels like a very nice horse in the making."

Then Williams turned from Size's friend to foe on Multivictory, with gate one and a clean jump allowing the rider to position himself perfectly in the run. "I thought he won the race in the last 200m, but then it was also key to be able to get off the fence when we wanted," he said.

Multivictory's sixth career victory puts his rating in the 90s for the first time, and even though it has taken the five-year-old 24 starts to get there, with some dips in form along the way, both Williams and Cruz believe a Class One win awaits the New Zealand-bred gelding.

Cruz said Multivictory's next start would be in the return leg of the interport series when he contests the Macau Hong Kong Trophy next month at Taipa, after a fourth in the first leg.