Manchester United have only won by a two-goal margin away from home once this season - against FC Sheriff. They need to do it again tonight for top spot.
It's the visitors who get things under way.
A big backing for Real Sociedad as the home fans hope to see their side wrap up top spot.
It has been chucking it down for most of the day there, but thankfully the rain has subsided now as the players come out onto the pitch.
Thomas: Important game for Man United tonight.