France international Lloris was accidentally caught on the side of the head by Everton striker Romelu Lukaku during Sunday's 0-0 draw at Goodison Park.
Lloris was briefly knocked unconscious and it looked as though Friedel would come off the bench to replace him.
But, following a consultation between Spurs' medical staff and manager Andre Villas-Boas, the decision was made to keep Lloris on.
That move has been criticised in some quarters but Friedel insists the decision was the correct one and confirmed Loris has made a good recovery from the knock.
"He was very quick off his line and is very brave when he comes to collect and clear balls," Friedel told Weekend Warm-Up.
"The doctors did their job, the manager asked the right questions. The doctors will err on the side of caution and nobody wants their players to be in harm's way.
"They did their jobs the correct way and he played on."
Friedel was stripped and ready for action before being told to return to the substitutes' bench but he admits he is too experienced to be concerned by the situation.
"I have played many games in my career so it doesn't really faze me. The gaffer said I might have to come on but he (Lloris) came through tests ok," added Friedel.
"Hugo gave the thumbs up and that was that."
The American also backed Manchester City keeper Joe Hart to bounce back from being dropped by Manuel Pellegrini, insisting he is still England's best stopper.
"Everyone can see that he has made a couple of mistakes but some of the mistakes he has been blamed for, us goalkeepers probably wouldn't," he added.
"Joe is a really good guy and I have always got on really well with him. I know he is a hard worker so I am sure this little setback in his career - which all of us had - I am sure he will work his way through it.
"He will still be England's No 1 at the end of it."