Aurillac paid their condolences to Fajfrowski’s family in a statement on the club’s website.
“The Stade Aurillacois is deeply saddened to announce the death of Louis Fajfrowski, a young hopeful of the club.
“Louis died as a result of a discomfort in the locker room during the friendly match between the club’s hopeful team and the Federale 1 Rodez team.
“The Aurillacois Stadium is in mourning and all its members send their very sincere condolences to the family of Louis and his family.”
Club legend Olivier Magne told radio station RMC that the side were devastated by the events.
“It’s a whole club, a city, a department and all the French rugby that are affected, who are bereaved, it’s a family member who went away, it’s very sad for French rugby,” he said.
“It is necessary to wait for the autopsy, do not draw an early conclusion.
“But there is an evolution [in] professional sports in general. We are going towards more speed, intensity, violence, there are more and more difficult contacts and they could be avoided.
“We will have to quickly provide answers.”
An official investigation has begun into the cause of death with an autopsy scheduled for Monday.