A dramatic head-to-head contest between two of the greatest stars of horse racing - Hong Kong's Silent Witness and US Horse of the Year Ghostzapper - may be approaching the starting post. Officials from a major American racetrack have approached Archie da Silva, owner of unbeaten champion racehorse Silent Witness, about shipping the five-year-old gelding to the United States for a US$3 million challenge. Less than two years after the hit movie Seabiscuit dramatically recreated the famous 1930s showdown between Seabiscuit and War Admiral, the owner of Ghostzapper, the world's top-ranked galloper, wants to stage a similar do-or-die battle with Silent Witness at Santa Anita Park, Los Angeles. Mr Da Silva confirmed the approach yesterday and said a representative of Magna Entertainment Corp, the parent company of the Santa Anita racetrack, would be at Sha Tin on Sunday when Silent Witness attempts his 17th successive win in the Queen's Silver Jubilee Cup. 'I have to stress at this point that there are still a lot of details to iron out, but the idea is exciting,' Mr Da Silva said yesterday by telephone from Dubai. 'The approach was made by a man named Dennis Milch, directly to [Silent Witness' trainer] Tony Cruz,' the owner continued. 'He said they have a sponsor who is prepared to put up US$3 million for a match race between Silent Witness and Ghostzapper at Santa Anita, with the winner to take US$2 million and the loser US$1 million.' Ghostzapper is the reigning Breeders Cup Classic champion. That win last October was enough to ensure the four-year-old colt became the top-rated galloper on the inaugural World Top 50 list, published by the World Thoroughbred Racehorse Rankings.