Dundee have voiced "serious concerns" to the Scottish FA over play not being stopped immediately following Michael Mellon's head injury during Sunday's Premiership match against St Johnstone.
Dundee manager Tony Docherty described the injury, which left striker Mellon unconscious at Dens Park, as "almost life-endangering".
The SFA says it will be replying to the Dens Park club direct, but the governing body does not plan on making any further statement on the matter.
Mellon required treatment following a clash of heads with St Johnstone captain Liam Gordon, with referee David Munro failing to stop play immediately.
The game was eventually stopped after Dundee's club doctor, Derek McCormack, ran on to the pitch, with a lengthy delay while the player received treatment.
Dundee confirmed the 20-year-old has now been released from hospital and the club have contacted the SFA to outline their concerns.
"Michael sustained a significant head injury in yesterday's match against St Johnstone, but thanks to the swift intervention by Dr McCormack and the medical team, his condition was stabilised and he was transferred to Ninewells Hospital Accident and Emergency Department," the club said in a statement.
"Following specialist investigations, he was discharged with appropriate head injury advice. He will continue his recovery under the supervision of the club's medical team in accordance with concussion protocols.
"The club is today writing to the Scottish FA in the strongest terms to express its serious concerns that play was not stopped to allow immediate attention to Michael after what was clearly a dreadful head clash."
Dundee came from behind to win 2-1 thanks to a late header from Jordan McGhee.