Dejan Kulusevski capitalises on a mistake from Nottingham Forest keeper to double Tottenham’s lead.
Turner comes under pressure from Heung-min Son’s pressing and plays a sloppy pass straight to Kulusevski.
The Swede wrongfoots Niakhate with some great skill before firing it past Turner at his near post.
The goal came moments after Nottingham had a goal disallowed for offside after a VAR review.
Richarlison had scored just before the half-time to open the scoring for Spurs.
They now have a comfortable lead in the game.