But a subsequent scan revealed the 21-year old had suffered a broken jaw and will miss both matches against the All-Blacks.
Ospreys' star Gough, capped 63 times, will join up with the squad before they fly to New Zealand on Wednesday.
"A scan after the game revealed a fracture to Sam's jaw which will prevent him from playing for at least a four week period," said Wales physio Mark Davies.
"He picked up the injury in the first half but was able to continue to play a part in the game and actually made no mention of it himself until after the final whistle.
"A closer inspection later on revealed the full extent of the problem."