Martin Zubimendi's double and Viktor Gyokeres's tap-in gave Arsenal a comfortable 3-0 home victory over Nottingham Forest in the Premier League on Saturday, condemning Ange Postecoglou to defeat in his first game as Forest boss.
Spain midfielder Zubimendi's first Arsenal goal, a stunning volley in the 32nd minute, capped a dominant first half for the hosts, though captain Martin Odegaard was forced off injured after falling heavily on his right shoulder.
Arsenal doubled their lead within a minute of the restart, Eberechi Eze capitalising on poor defending by substitute Nicolo Savona to lay it on a plate for Gyokeres to score his third of the season.
The game was petering out when Zubimendi put it to bed in the 79th minute with a simple header from Leandro Trossard's cross, prompting gleeful chants from Arsenal's fans towards Postecoglou, former manager of their bitter rivals Tottenham Hotspur.

Sarfaraz named Pakistan's test coach for Bangladesh series
Coventry promoted to Premier League after 25-year absence
Gujarat sink Kolkata with adaptable bowling in IPL
Alcaraz pulls out of Madrid Open for second straight year
Injured Djokovic to miss Madrid Open
