Tottenham Hotpsur’s unbeaten run remains intact but a far more crucial fact for Mauricio Pochettino at the end of this classic encounter will be that his team’s winless streak, dating back to 2 October, has ended. Spurs dominated for long spells of this pulsating London derby but it was not until Harry Kane, the most prolific of goalscorers against local rivals, scored twice in the final two minutes that a first defeat of the season was…