Arsenal's top-four hopes suffered another blow as they lost 3-1 to West Bromwich Albion at the Hawthorns against a backdrop of planes with banners calling for Arsene Wenger to leave and another supporting him.
The hosts made a good start with Allan Nyom breaking down the left and beating three men before flashing a ball across the face of the Arsenal goal, and minutes later James McClean drew a good save from Petr Cech.
From the resulting corner Craig Dawson beat Laurent Koscielny in the air to head West Brom in front on 12 minutes.