World athletics chief Lamine Diack says Britain will lose all credibility if the 2012 Olympic stadium is converted into a football stadium without an athletics track after the Games.
The stadium's future has become the focal point of London 2012's legacy promises made during the capital's winning bid to the International Olympic Committee in 2005.
London Premier League club Tottenham Hotspur proposes to dismantle the track if its bid to move into the east London venue succeeds ahead of West Ham United. The two clubs will make their final submissions to the Olympic Park Legacy Company on Friday.
Diack, who is the president of the International Association of Athletics Federations and an IOC member, told the BBC London's 2005 submission would have been a "big lie" if the track were removed.