Arsenal remained within touching distance of the top of the Premier League table after a crucial victory against a dogged Nottingham Forest side.
Goals from Gabriel Jesus and Bukayo Saka put Mikel Arteta's men in cruise control at the City Ground before Taiwo Awoniyi sparked a grandstand finish.
Jesus had made the breakthrough after pulling the trigger from a tight angle and threading the ball through the legs of goalkeeper Matt Turner at the near post.
12 minutes later, Saka rounded off a clinical counter-attack after guiding a finish into the far corner with aplomb, rendering Awoniyi's goal a mere consolation.