Mauricio Pochettino said referee Mike Dean changed the course of the north London derby with two mistakes in the build-up to the first of Arsenal’s two goals in what was a major victory for Arsene Wenger’s team at home to their rivals.

The Tottenham Hotspur manager said that Skhodran Mustafi’s goal had been offside and before that Dean made a mistake in wrongly awarding the free-kick that led to it, against Davinson Sanchez, Spurs’ best player in a below-par performance.

Pochettino said: “If you analyse the game until we concede the goal [in the 36th minute] the team was doing well before. We were better than them but in the end it is a massive mistake like this.