The same Alonso who was really good from his first game for us. Tried to play through a broken ankle and then came back whilst still not fit to beat Juventus and go on to help us win the Champions League in his first season?
If Rudiger wasn't sticking his arm out it would be offside but I think it's on. Either way it's a nailed on VAR situation.
Edit. It's the shoulder that counts.
I like the idea of them playing on absolutely tiny pitches and wondering what the f*** is going on while an embarrassed groundsman belatedly realises he got his mm and cm mixed up.