Algo,
I watched 1st set of both matches.
Vs Heinrich ; your level is quite close of him, but your depth positioning ( = up / down) is really 1 step behind him, plus he varies better his game than you, thus the very harsh score (even more as it seems you stepped down a bit after the 1st few games) ; as he said, topspin is not really an element there, except maybe for the short acc, which he uses quite well
Vs Nadal ; there's the topspin is much more prominent, and your problem on depth positioning even more damaging... But I noticed a couple of things that I'll fix in incoming v1.0c (it should be released within 10 days) ; it'll be very subtle and probably won't change the score much against him (mainly the topspin will be limited on some extreme situations)
In TE4 (which won't be due before a looooong time, so don't hold your breath

), it'll have a big rehaul of strike precision/imprecision which will incurs a lot of changes to the way topspin work ; so it'll be a good occasion to see again the balance...
