UK Athletics chief Ed Warner says Tottenham's bid to take over the Olympic Stadium and remove the running track is "completely unacceptable".
The Spurs/AEG bid is on a shortlist of two against a consortium led by West Ham/Newham Council.
UK Athletics have already formally backed West Ham's bid and chairman Warner told BBC Sport: "Tottenham and AEG have made it clear that they will rip up the track and make it a football-only venue and that is hugely concerning to me.
"It is [essential] for Tottenham and AEG to go back to the original promise made in 2005.
"That was about UK Athletics being at the heart of the Olympic Park."
