thanks for posting. I admit, I'm not great at tracking this stat. Usually I only notice a long streak when it begins a set(then I go back & see if they ended the previous set with a streak)
If they have a long streak in the middle of a long set, I'm less likely to see it or bother counting.
I would imagine Martina had a long streak at some point, do you know what her highest 1st serve pts won % was in matches we did?
That Chang one is pretty surprising, I don't recall that match as being close at any point.
I wonder if Stich had a long streak vs Sampras at '93 Masters, think he served 7 straight aces at one point.
Federer vs Lopez at '07 USO is another possible long streak, since he won 35 straight points on serve.