EPSOM Derby placegetter Silver Wisp is entered for next month's International Cup and his expected clash with local champion River Verdon will be the most significant showdown in Hongkong's racing history. Silver Wisp is trained by former internationally-known jockey Geoff Lewis at Epsom and ran third to Dr Devious and St Jovite in last June's Classic. He will be the highest rated horse to race in Hongkong. But trainer Lewis, who rode for several off-seasons in Hongkong in the 1970s, has one proviso for his stable star. He said last night: ''We want to run in Hongkong but he is down to race at Doncaster at the first meeting of the new season here and it will depend on how he comes through that. If he is okay then we're off to Hongkong.'' Almost certain to ride Silver Wisp will be the currently Hongkong-based Irish champion jockey, Mick Kinane. Silver Wisp was targeted for last December's abandoned Invitation Cup meeting but ran into problems in late October. However Lewis, who is having great success as a trainer, has spent the winter months getting his Classic galloper right. Overseas entries for the 1,800-metre Cup and 1,400-metre International Bowl will be announced today, but Silver Wisp is easily the most significant. St Jovite and Dr Devious largely dominated British and Irish racing last season and Silver Wisp's Epsom Derby efforts put him right into the top bracket of European gallopers. It will also give the re-arranged International Cup a tremendous boost, propelling it into the European spotlight on the April 18 weekend after fears it could be overshadowed by the British season, which will by then be getting into full stride. Silver Wisp's Far Eastern raid has more significance when taken in the context of local hero, River Verdon. Trainer David Hill's superstar won the last running of the race in December 1992 but did not raise too many eyebrows in the northern hemisphere as he beat Group Three winner Prudent Manner. The presence of Silver Wisp, however, gives the race real stature and a local victory would boost Hongkong racing enormously - and the status of River Verdon. His defeat in the Arlington Million last September gave the international knockers ammunition even though the horse ran creditably given the circumstances of his preparation and the timing of the race. And trainer Hill would relish a clash with Silver Wisp. ''I have never been happier with River Verdon than I am at this minute. And he has never been in better shape. We are honestly happy to take on all comers and it will take a very, very good horse to beat us. ''We have to be realistic, too. This will almost certainly be River Verdon's international swansong. He will probably be at the top locally for a while yet but when it comes to taking on top overseas horses it will be a different matter,'' he said. ''But now the timing is perfect. He is going to be at his absolute peak for the International Cup,'' said Hill.