My worry as ever is that Sibley can hang around and not get out, but I think his mind is so scrambled now, he has no idea how to accelerate, I'm not talking about getting into fourth gear, just getting out of neutral and into 1st would be progress now.
Small milestones:
Both openers into double figures,
25 run partnership,
50 run partnership.
I'm happy with this slow, Test progress.