Mattia Debertolis died on Tuesday, Aug. 12, after collapsing at the World Games in Chengdu, China on Friday, Aug. 8

Italian orienteering athlete Mattia Debertolis died on Tuesday after being found unresponsive during competition at the World Games in China's Chengdu, organizers said. The 29-year-old was discovered unconscious during an orienteering event on August 8 and died four days later,