A former Mexican presidential candidate who was disqualified from the Berlin marathon for taking a short cut has said he never meant to finish the race.
Mr Madrazo was photographed crossing the finishing line
Roberto Madrazo had clocked the best time for his age category in Sunday's race - taking two hours 40 minutes.
But officials found he had skipped a nine mile (15km) section of the course.
The 55-year-old blamed political opponents for the furore surrounding the incident, which has seen him lampooned in his home country.
Race officials looked into the case after a photographer noticed Mr Madrazo finishing the race wearing a jacket and long running tights but hardly sweating.
They stripped him of his first-place title.
But Mr Madrazo has insisted he did not cheat.
"I had to stop after 21km and I went directly to the finish line for my clothes and my medal for taking part," Mr Madrazo said. "In sport there are no short-cuts, there are personal challenges."
He also said political opponents were trying to tarnish his image and hinder his plans to set up a marathon-running foundation.
"It is political. By doing this, they are seeking to throw mud on a sporting activity that I have practiced for many years and on my new social project," Mr Madrazo said.
"My marathon times have been between three hours, 14 minutes and three hours, 54 minutes - never two hours and 40 minutes," Mr Madrazo said. "It would be impossible for a 55-year-old man to do that."
Mr Madrazo was a presidential candidate last year for the Institutional Revolutionary Party - the party whose 71 continuous years in power ended in 2000. He finished a distant third in the vote.