Right then, let's get this on.
Arsenal need a point to top their Europa League group.
West Ham are playing just to complete a clean sweep of wins in their Europa Conference League group.
Both games are under way.
They visited in successive seasons, in 2015-16 and 2016-17. Astra Giurgiu were 2-1 winners in the Uefa Europa League third qualifying round in August 2015. The same side bagged a 1-1 draw on the way to a 2-1 aggregate victory in the play-off round of the same competition a year later.