Former Chelsea club doctor Eva Carneiro believes the return of the Premier League season cannot be discussed until phase one is complete.
Clubs are set to vote on a return to group training on Monday, the first significant step towards restarting the season on the Premier League's next target date of June 19.
But until players have returned to training successfully without any complications, talks of matches resuming should be sidelined, according to Carneiro.
"My message to them is we cannot talk about returning to full-time competition when we haven't even delivered phase one," she told The Times.
"We need to learn and adapt from phase one first and I'm most concerned that the guidance does not consider the culture of football and the lack of existing medical governance."
Plans to return to training have been opposed by a number of players, including Watford's Troy Deeney, Danny Rose of Tottenham Hotspur, Manchester City star Raheem Sterling and Brighton striker Glenn Murray.
And Carneiro feels sympathy for those players with the virus now impacting younger people, not just the elderly and vulnerable as earlier suggested.
"This isn't scaremongering,' she added. "I understand the economic implications at play here.
"A lot of the sports that will suffer are women's sports, matters very close to my heart. But there needs to be an understanding of the risks."
