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Italian Orienteer Mattia Debertolis Dies After Collapse at Chengdu World Games

Organisers have not disclosed a cause after four days of hospital treatment under expert care.

Italian Athlete Mattia Debertolis Dies At World Games In China Under Mysterious Circumstances
Mattia Debertolis of Italy competes in men's middle distance qualification race during day 1 of the World Orienteering Championship in Tahko, Finnland, on July 8, 2025.
The 2023 Special Olympics World Games kick off with an epic night of celebration and joy during the Opening Ceremonies held at the Olympic Stadium in Berlin, Germany
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Overview

  • Debertolis, 29, was found unconscious on August 8 during the men’s middle-distance orienteering final about 50 km outside Chengdu and was listed as “Did Not Finish.”
  • A joint statement from the International World Games Association, the local organising committee and the IOF said he received immediate expert medical care at a leading Chinese hospital but died on August 12.
  • The demanding 6 km course featured 180 m of ascent and 20 control points, with temperatures above 30 °C exacerbating the challenge.
  • Orienteering officials and World Games organisers have extended condolences and vowed ongoing support for Debertolis’s family and the international orienteering community.
  • Debertolis had been competing internationally since 2014, was ranked 137th by the IOF and was studying for a PhD in civil engineering at KTH Royal Institute of Technology in Stockholm.