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FILE - this is a Feb. 20, 2008 file photo of Cheltenham Gold Cup winners Kauto Star, right, is seen and stablemate Denman, left, and their trainer Paul Nicholls at their stables in Ditcheat, England. Kauto Star has been confirmed to go head-to-head with stablemate Denman for the fourth time in a row in next month's Cheltenham Gold Cup, the race they have dominated for the past three years. Both trained by Paul Nicholls, the two rivals have won the race for the past three years. Last year, Kauto Star became the first horse to regain the winner's prize after losing to Denman in 2008 and the two were in the list of 19 named Wednesday Feb. 17, 2010 for the highlight race of the Cheltenham Festival. (AP Photo/Alan Crowhurst, File)