At least three clubs are at risk of missing a self-imposed deadline to improve access for disabled fans, the Premier League has said.
A report suggests Bournemouth, Chelsea and Watford may not fulfil a pledge to meet standards by August 2017.
It stressed clubs have been "working hard on delivery" since a 2014 BBC report found that 17 of 20 clubs did not provide enough wheelchair spaces.
But campaigners have criticised the failure to meet the standards set out.
"The time for excuses is over," said David Isaac, chair of the Equality and Human Rights Commission.