More significant was the distance it put between themselves and Arsenal and Manchester City, with the Gunners now 11 points behind and City 12 behind the league leaders.
And that is too big a gap for both of those sides to make up in the games remaining as far as Koeman is concerned, making it a two horse race from here on in.
“11 points from Arsenal and 12 from Manchester City, they can’t win the title,” he told Sky Sports.
“It will be a fight between Tottenham and Leicester and in my opinion that is the difference than before the game and after the game.”
“It’s now the fight between two teams, before it was a fight between four or five and that’s the difference. That starts to run in your mind as a Leicester player.”
It will now be interesting to see if the pressure starts to get to Claudio Ranieri’s team the closer they get to the title.
So far they have shown no signs of that happening, instead going game-by-game and never failing to impress with their displays.
With them now the favourites though, that brings its own kind of pressure that the majority of this squad will not have experienced before and getting over that could be the last hurdle in one of the best title wins in football history.