Tottenham Hotspur have insisted medical staff were "totally satisfied" that Hugo Lloris was fit to continue playing against Everton after criticism from Fifa and a leading charity over their decision not to substitute the French goalkeeper.
In a statement, head of medical services Wayne Diesel said: "Once the relevant tests and assessments were carried out we were totally satisfied that he was fit to continue playing."
Fifa's chief medical officer has insisted Tottenham Hotspur goalkeeper Hugo Lloris should have been substituted after being knocked unconscious during Sunday's match against Everton.
Professor Jiri Dvorak said there was a "99 per cent probability" that Lloris would have been concussed after being knocked out when his head made contact with Romelu Lukaku's knee, and should of been replaced under Fifa's guidelines.
"The player should have been substituted. The fact the other player needed ice on his knee means it's obvious the blow was extensive," Professor Dvorak said.
"When he has been knocked unconscious, the player himself may not see the reality. I do not know the details but I know that the Premier League doctors are extremely good and I can imagine that the doctor may have recommended he be replaced."
"We have a slogan: if there is any doubt, keep the player out."
Tottenham Hotspur's decision to allow goalkeeper Hugo Lloris to play on despite suffering a head injury was "irresponsible", a leading brain injury charity has said.
"We are hugely concerned that a professional football club should take such an irresponsible and cavalier attitude to a player's health," Headway spokesman Luke Griggs told ITV News.
"When a player - or any individual - suffers a blow to the head that is severe enough for them to lose consciousness, it is vital they urgently seek appropriate medical attention.
"A physio or doctor treating a player on the pitch simply cannot accurately gauge the severity of the damage caused to the player's brain in such a setting as there may be delayed presentation of symptoms.
"By continuing to play, the player may have caused greater damage to his brain. He should have been removed from the game immediately and taken to hospital for thorough tests and observation."