Riccardo Calafiori and Kai Havertz face off in the return of What Do You Know, competing to see who comes out on top in their knowledge of international football, the UEFA Champions League and languages. #afc #arsenal #calafiori #havertz #ucl #premierleague Enjoy highlights, training, behind the scenes and documentaries to get closer to the likes of Bukayo Saka, Martin Odegaard, Alessia Russo, Leah Williamson, Kai Havertz, Kim Little, Declan Rice, Ben White, Stina Blackstenius and more. Subscribe to the Official Arsenal YouTube Channel: https://arsn.al/youtube Follow us on Facebook: https://arsn.al/facebook Follow us on X: https://arsn.al/twitter Follow us on Instagram: https://arsn.al/instagram Follow us on TikTok: https://arsn.al/tiktok