LONDON - Ashton Eaton of the United States produced a totally dominant performance over two gruelling days to claim the Olympic decathlon gold medal on Thursday. The world record holder amassed 8,869 points in the 10-discipline event, to finish 198pts ahead of team-mate and world champion Trey Hardee (8,671), with Cuba's Leonel Suarez claiming bronze (8,523). Eaton's total was the second best in Olympic history behind the 8,893pts notched up by Roman Sebrle in 2004. On Ethiopian Tirunesh Dibaba attempts a track double on Friday in the 5,000 metres to add to the 10,000 Olympic crown she retained in thrilling fashion a week ago in London, but two doping cases overshadowed another action-packed day at the Games. France's 5,000 metres runner Hassan Hirt failed a test for the banned blood booster EPO (erythropoietin) prior to competing in London, where he finished 11th in his first-round heat on Wednesday and failed to qualify. Kenyan athletics officials also confirmed on Friday that distance runner Mathew Kisorio had tested positive for a banned substance in June.Spain beat Russia in their men's basketball semi-final and will meet either 2008 champions United States or 2004 Olympic winners Argentina in Sunday's gold medal game. In handball, three-time men's silver medallists Sweden gave themselves a chance of a first Olympic gold medal by beating Hungary, and will play either holders France or twice winners Croatia in Sunday's gold medal game.If Dibaba can she can win Friday's 5,000m, she will be emulating the 5,000/10,000 double of Finnish man Lasse Viren in 1972/76. The Ethiopian retained her 10,000m crown a week ago with a scintillating last lap, demonstrating that she was back to her best after years of injury.In wrestling, Jordan Burroughs of the United States became the Olympic men's 74kg freestyle wrestling champion by defeating Iran's Sadegh Gourdazi in the final. The bronze medals went to Russia's Denis Tsargush and Soslan Tigiev of Uzbekistan. Dzhamal Otarsultanov rewarded the Russian selectors with an Olympic gold medal when he took the 55kg men's freestyle wrestling title. Otarsultanov was picked ahead of Viktor Lebedev after defeating the two-time world champion and made good on that form with victory in the Olympic final.