That serve is absolutely killing him. Why is it so inconsistent? Days where's it's firing he looks back to his best, but more often than not it's just appalling and he ends up having to grind out tough wins or - and it's happened far too often this season - he gets beat.
This match could go either way really. I just can't believe how diabolical his serving is on days like this. And it really reveals how weak his second serve is when he's having to make one on every other point.
It's 80% this set.