'Let's put it this way, how Silent Witness goes in the 1,400m race on April 24 will determine where we go with him' A proposed joint-venture between the Hong Kong Jockey Club and the Japan Racing Association in coupling up and re-branding their Group One mile races in May and June could attract the ultimate participant - unbeaten champion Silent Witness. A decision on whether the two-race Asian mile mini-series - featuring the Champions Mile at Sha Tin in May and the Yasuda Kinen in Tokyo the following month - goes ahead is expected within the next week. Ciaran Kennelly, the Jockey Club's senior handicapper and manager of international race planning, said yesterday the concept was for the group one Champions Mile on May 14 to become an international race, with upgraded prize money to at least US$1 million. In order to attract Japan's top milers away from their Keio-Hai Spring Cup the same weekend, it's possible a substantial bonus incentive would also be introduced, payable to the winner of the Champions Mile-Yasuda Kinen double. Archie da Silva, owner of Silent Witness, said last night he would be 'very interested' in the two races for the champion if the HKJC and JRA are able to come to terms on the joint venture. 'Let's put it this way,' Da Silva said. 'How Silent Witness goes in the 1,400 metres race on April 24 will determine where we go with him. 'If he wins narrowly, and looks like 1,400 metres is as far as he wants to go, then he would probably revert to sprinting. 'But if he sprints away, like he usually does, and runs the 1,400 metres right out, then I would be very interested in looking at running him in the Champions Mile.' On Sunday, Silent Witness extended his winning sequence to 15 in capturing the group one Centenary Sprint Cup (1,000m) from stablemates Country Music and Multidandy. His time of 56.7 seconds was exceptional, given the wet conditions under foot, and his authority was such that he spread his rivals out over more than 20 lengths. The champ's next run will be in the Chairman's Sprint Prize (1,200m) on April 3, followed by the Queen's Silver Jubilee Cup (1,400m) on April 24. And if he remains unbeaten at that point, his career figures will have extended to 17 from 17. Kennelly said the champion's international rating remained at 123, even though he may not have quite run to it in his two latest victories over Country Music. 'You can't put down a definite performance figure for Silent Witness because in neither of these races has he been asked to fully extend,' Kennelly explained. 'But we know with Silent Witness, there is always more there if required, and something will need to make him perform at a higher level if he's to get a higher rating.' Kennelly said that County Music, in finishing second to Silent Witness by a similar margin on two occasions, had shown himself worthy of a shot at the King's Stand Stakes (1,000m) at York in the north of England in June. 'I tend to take a more conservative approach [to handicapping] but I have the horse continuing to improve and, on the figures he is returning now, he's good enough to be competitive there.' Kennelly described himself as 'an internationalist' and, as one who has been the primary advocate for Silent Witness being officially recognised as the world's premier turf sprinter, he'd now like to see him prove it. 'I feel very proud that a horse from Hong Kong, like Cape Of Good Hope, could go overseas and win at group one level,' Kennelly said. 'And I'm also very proud that Hong Kong can produce a world champion like Silent Witness. 'When you see what Cape Of Good Hope can do in both England last year and Australia recently, you don't have to be a genius to realise that Silent Witness would be winning any of those races.'