Arsenal recorded a significant victory away at Tottenham Hotspur in the North London derby, but there were some controversial moments. There was plenty of debate over whether defender Jurrien Timber was lucky to avoid a red card after a clash with Pedro Porro, but the Arsenal star stayed on the pitch to deliver an outstanding performance. Gabriel Magalhaes netted the winner with a header from a corner, which highlighted Arsenal’s continued excellence at dead-ball situations, as well as Tottenham’s vulnerabilities in defending against set-pieces. However, Arsenal icon Paul Merson claimed that G…