Arsenal have a european game mid-week. Doesn't that often lead to poor results at the weekend? Perhaps a weaker team, giving their big guns a rest as it's only palace.
They might rest Giroud after European exertions, and bring in Bendtner as back up. Given that he took one look at the Palace training ground and decided tha he'd rather play for Arsenal's reserves, it would add an extra amusing angle, if he notches a few.
Palace 0 - 4 Arsenal
Bendtner (2)
Ramsey
Rosicky