Multiple Group One winning jockey Glen Boss has declared Australia's unbeaten mare Black Caviar in a league of her own, despite the thrashing that Singapore's Rocket Man gave his rivals in the KrisFlyer International Sprint (1,200m) at Kranji racecourse on Sunday night. Boss may be the most qualified man to compare the top sprinters, and has watched in awe as both Rocket Man and Black Caviar toyed with their respective rivals, and his own high-quality mounts, this month. Rocket Man's win took his record to 16 victories and four second placings from 20 starts, while Black Caviar has been sent to the spelling paddock with an unblemished record of 13 from 13. The match-race being touted between the two star sprinters is a mouth-watering proposition, and Hong Kong fans are in the running to be the first to witness Black Caviar and Rocket Man in the same event, the most likely date to be in the Hong Kong Sprint in December. Boss partnered former world champion sprinter Sacred Kingdom and could only watch from behind as Rocket Man turned on the afterburners to bury his rivals by a widening 43/4 lengths, and recently filled the same role on the classy Hay List, who has been the horse to get closest to matching Black Caviar in Australia. 'I think Hay List would definitely give Rocket Man a run for his money, that would be an interesting race in its own right and I feel they would be very closely matched,' Boss said. 'Black Caviar's record says it all, she's unbelievable and I doubt anything could go with her. 'Rocket Man is five years old and right at the peak of his powers, while Sacred Kingdom's best years are undoubtedly behind him now.' A practical joke played on Boss by Caulfield trainer Peter Moody also makes the jockey one of the best reference points for any discussions about who is the fastest sprinter in the world. 'I was at trackwork in Melbourne one morning and Pete legged me up on a horse called 'Maggie,' and asked me to give her a little squeeze in the straight and tell him what I thought,' Boss recalls. 'The feeling this filly gave me was enormous, she coasted in the gallop and we were flying. I told Peter, and anyone that would listen, that I wanted to be on the horse wherever she raced, and he let me go for a few hours before he called to let me in on the joke that Maggie was the stable nickname for Black Caviar.' Trainer Ricky Yiu Poon-fai reported the ageing galloper has pulled up fine. 'We will have to consider what to do with him now,' he said.