07/25/2007 12:00AM

Etc. . . .

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Assiniboia Downs canceled its Tuesday evening card because of extreme heat and humidity. Racing was scheduled to resume Friday. . . . The British-based auction house Tattersalls will sponsor the Irish Champion Stakes in 2007, 2008, and 2009. The Group 1 race at Leopardstown, to be run Sept. 8 this year, will be billed as the Tattersalls Millions Irish Champion Stakes.