The 20-year-old is with Kieran Gibbs and Carl Jenkinson in the picture.
Having just been dumped out of the Champions League and with a crucial Premier League game against North London rivals Tottenham at the weekend, fans were worried that Oxlade-Chamberlain's mind was elsewhere.
Tediously, the midfielder then had to explain the concept of Throwback Thursday and the #tbt hashtag.
About my last tweet "#TBT" means "throwback"! It's an OLD pic from summer! We're not in dubai now before the derby!!😱😱 it's straight work!— Alex Ox-Chamberlain (@Alex_OxChambo) March 13, 2014
The moral of this story is presumably not to tweet anything, ever, because someone, somewhere will find a way to misunderstand it.