Leandro Trossard got the all important goal for the visitors in the 90th minute after the visitors had threatened Spurs all game and just about deserved the win.
The midfield of Pierre-Emile Højbjerg and Rodrigo Bentancur were nailed by the impressive Yves Bissouma who produced one of his best displays this season to the frustration of the Tottenham fans who came looking for three points that would help push them to a top four finish.
It was a particularly frustrating afternoon for Antonio Conte who has seen a real improvement in his team these last days but would have been disappointed with the way they surrendered against Brighton.
The number 10 role Harry Kane usually drops in to link-up play and set up his partner in crime, Son Heung-min was dominated by Yves Bissouma which would have frustrated the England captain as he desperately tried to get himself in the game in the second half.
The race for Champions League spot continues to swing from one team to the other and it will be interesting to see how Arsenal get on against Southampton later on in the day.
But in what was a disappointing outing for the Lillywhites, this is how we rated them on a disappointing afternoon.
1. Hugo Lloris
Has been solid and would be disappointed to have conceded late on-5
2. Cristian Romero
Strong and very intelligent on the ball, sadly dropped off in the second half and conceded -5
3. Eric Dier
Has been the best centre-back would be disappointed with his role for the Spurs goal-5
4. Ben Davies
As always quietly going about his business and did not have a role in the goal- 5.5