The Spanish playmaker opened the scoring midway through the first half in the traditional curtain-raiser to the English season.
Aaron Ramsey, who scored the winner against Hull in May, then made it 2-0 just before the interval for the Gunners.
Ramsey makes it 2-0 for Arsenal! http://t.co/TvgEgZXhE7— The SPORT Bible (@TSBible) August 10, 2014
French international Olivier Giroud came on at half-time and scored a stunning third for the Londoners.
Golazo Giroud. https://t.co/Lg4MUrNFVx— Fútbol Fichajes (@FutboolFichajes) August 10, 2014
The match ended 3-0 to Arsenal. The Premier League starts on Saturday.