Champion jockey Douglas Whyte finds himself in the unaccustomed role of spoiler today as he attempts to blow the new roof right off Sha Tin and hijack the return of world champion sprinter Silent Witness in the Cathay Pacific International Sprint Trial. Whyte, so often the man aboard the hot favourites in local racing, wrecked the day for Tony Cruz-trained hotpot Lucky Owners in the Classic Mile last season. That horse was considered all but unbeatable, but a brilliant tactical display from Whyte saw Tiber home first in the Group One contest. Now the Durban Demon is out to do the same thing to Silent Witness with Danny Shum Chap-shing's charge Scintillation, but he is the first to admit that this is a task of a different level again, not the least of the problems being predicting how Scintillation will handle 1,000 metres again. 'It's difficult to predict exactly how Scintillation will go here because I suspect, having had that one run at 1,000m, he's not quite as sharp now,' Whyte said. 'While he was fresh, he handled it well, but he's probably more of a 1,400m horse and may get a mile. He wasn't quite as sharp in his barrier trial up the straight on November 2, when he finished fourth to Silent Witness, as he was winning the Sha Tin Sprint Trophy.' But since being fitted with a hood last season, a move which transformed the Danehill gelding, Scintillation has become a favourite of Whyte's during the past six months with his ability to travel easily at high cruising speeds and he was not selling him short for his toughest test. 'Having said that this isn't really his distance, he is one of those horses who is quite deceptive,' Whyte said. 'Before his last start, I could never have imagined he would lead all those fast horses that were engaged in that race - and not only lead them but do it easily in front. 'These days, he's a much more relaxed horse who will be switched off most of the time, but can suddenly flick the switch and turn it all on under race conditions. This is an awesome assignment and I don't take it lightly. Yes, I'm happy with my horse, but this is Silent Witness we're up against.' Silent Witness, looking for his 12th consecutive victory, his ninth down the Sha Tin 1,000m course, is officially recognised as the best turf sprinter on the planet. And as others have found before Scintillation, this is when you discover you're playing in the Premier League. Add to everything else in Silent Witness' favour the fact that his trainer Tony Cruz and jockey Felix Coetzee are visibly happier with the champion's preparation this season and it adds up to a monumental challenge for his rivals. While Silent Witness in particular will take the attention on the racetrack, the Jockey Club goes full time with the new $400 million parade yard under the retractable roof today and will mark the occasion by giving away to racegoers a commemorative DVD on the construction of the structure as they enter the course at Sha Tin. New parade ring memorabilia will also be on sale. The club is anticipating a good crowd for the occasion, too, after giving away complimentary tickets at off-course betting branches.