Not only did he score his second senior goal, a header like his first (at Wolves on the final day of last season), which set Manchester United on our way to a welcome 3-1 victory in the capital, but he was also able to share a couple of special pictures afterwards.
This is because Pontus Jansson, the Bees captain, is somebody whom Anthony knows from the past.
The electric wide man's fellow Swede is, in fact, a former team-mate of Elanga's father Joseph, from their time together at Malmo.
Anthony even posted a classic photograph on Instagram of him as a young kid with the pair, celebrating a league title win in 2010, when head coach Roland Nilsson's team beat Helsingborgs by two points to lift the trophy.