Match Referee Andre Marriner looks on as Sergio Reguilon points out the incident. Photo / Getty
The referee, Andre Marriner, took the players off the field after around six minutes, with the total stoppage lasting around 20 minutes as the fan received treatment.
Later updates confirmed the fan was awake and responsive in hospital while Reguilon and Dier were jointly awarded Man of the Match for their heroic efforts.
Speaking to Sky Sports after the match, Tottenham's Harry Kane revealed what it was like watching the incident unfold.
"First and foremost we want to say best wishes to the guy in the stands," he said.
"It wasn't a good sight to see, and we hear he might be stable now, so we're thankful to the medical team and the fans. Hopefully he is okay, and we wish him all the best from Spurs and the players."
Tottenham went on to beat Newcastle 3-2 once the game resumed.