#1 Lost the midfield battle against Graham Potter's side
Ultimately, the scenario of where the game was won or lost was in midfield - an area complete congested and ruled over by the Seagulls.
They played with a 4-4-2, but the methodologies remained the same. The idea was to play out from the back, press in numbers and patiently try to carve open a defence that has failed to celebrate a clean sheet since the turn of the year.
Brighton thus, completely dominated the central areas of the pitch by suffocating the likes of Tanguy Ndombele, Eriksen and Son. As a result, the opposition was forced to fight harder to transcend to the top end of the pitch.
Time and time again, they lost the ball, gifted it back to Brighton and were out=muscled by Potter's spirited side. Eventually, Spurs ran out of ideas ad struggled to commit many bodies forward.
Tactically, the decision to deploy Aaron Mooy and Pascal Gross in the wider areas to stretch the opposition backline but also prevent the Spurs' full-backs from charging forward was nothing short of masterful.