October 2011:
HT: Chelsea 2-1 Arsenal
FT: Chelsea 3-5 Arsenal

December 2019:
HT: West Ham 1-0 Arsenal
FT: West Ham 1-3 Arsenal

Arsenal win a Premier League away game after trailing at half-time for the first time in over eight years. 😳 pic.twitter.com/FZvcjLZSME

— Squawka (@Squawka) December 9, 2019