Four days on from rewriting the men's marathon world record in London, Sabastian Sawe used his first sit-down media session to push the conversation away from his shoes and onto his blood. The Kenyan, who broke the tape on The Mall on 26 April in 1:59:30 to become the first athlete to run a legal sub-two-hour marathon, said a voluntary, sponsor-funded testing programme had been built around him for the past 12 months specifically to pre-empt the doubt that has greeted every Kenyan distance breakthrough of the past decade.
Speaking to international media in London, Sawe said Adidas had paid the Athletics Integrity Unit US$50,000 to run an enhanced out-of-competition testing programme on him in the months that followed his Berlin Marathon victory in September 2025 and through the build-up to London. The 30-year-old said he had been tested on roughly 25 separate occasions ahead of Berlin and a similar number ahead of London, taking his total to about 50 unannounced visits inside a year. "I wanted there to be no doubts," Sawe told reporters, adding that "doping has become a cancer in my country" and that he hoped his programme would set a template for other elites who have the means to commission additional scrutiny.
The transparency move is significant in part because of who is paying for it. Manufacturer-funded testing of an individual contracted athlete is unusual at the elite level, and the AIU has historically relied on a mix of World Athletics levies, federation contributions and a small pool of national programmes to plan its out-of-competition schedule. Sawe's arrangement does not replace any of that — the AIU continues to test him as a registered international-level athlete — but it has materially raised the frequency of visits and the breadth of biological samples collected, including for the Athlete Biological Passport.
The context for Sawe's intervention is the long shadow cast by Athletics Kenya's anti-doping caseload. World Athletics still classifies Kenya as a Category A federation under its anti-doping rulebook, and the AIU's most recent quarterly disciplinary report documented further provisional suspensions of Kenyan distance runners during the spring road season. Sawe's coach, Patrick Sang, has previously argued that voluntary additional testing should become standard for any Kenyan athlete chasing a championship medal or world record, and Sawe's London programme is the most public expression of that approach yet.
Whether the testing-by-sponsor model spreads will depend on the AIU's appetite for scaling it. The unit has indicated that it would welcome additional ring-fenced funding from federations, manufacturers and major-event organisers, but any such arrangement has to remain at arm's length from the athlete to preserve credibility. For now, Sawe's 1:59:30 will stand on its own paperwork: a sub-two-hour marathon delivered with a public-record set of out-of-competition tests behind it, and a clear challenge to the rest of the world's marathon majors to ask their headline acts the same questions.