David Luiz's first goal in an Arsenal shirt saw off Bournemouth and propelled us up to third in the Premier League.
The Brazilian - signed from Chelsea in the summer - met Dani Ceballos' corner from the right-hand side and placed his header to perfection, beyond the dive of Aaron Ramsdale and into the bottom corner.
Pierre-Emerick Aubameyang had already gone close as we started the match brightly, and Pepe curled a shot just beyond the top corner at the end of a Matteo Guendouzi-inspired move.
Bournemouth arrived with attacking intentions but they only really came to life in the second half.