Welcome to The Knowledge.
Last summer we quizzed the first-team squad about their specialist subject - themselves.
And since the season began, we've been asking the same questions to Arsenal fans.
Now it's time to reveal who has got The Knowledge.
Next up it's Arsenal goalkeeper Vito Mannone versus Gunners fan Neil Shah. Does Neil know more about Vito's career than Vito does?!
Watch the video clip to find out.Copyright 2017 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source