LONDON, ENGLAND - SEPTEMBER 14: Reiss Nelson of Arsenal during the UEFA Europa League group H match between Arsenal FC and 1. FC Koeln at Emirates Stadium on September 14, 2017 in London, United Kingdom. (Photo by Catherine Ivill - AMA/Getty Images)
LONDON, ENGLAND - SEPTEMBER 14: Reiss Nelson of Arsenal during the UEFA Europa League group H match between Arsenal FC and 1. FC Koeln at Emirates Stadium on September 14, 2017 in London, United Kingdom. (Photo by Catherine Ivill - AMA/Getty Images)