Actually topspin is more problematic on turf..lol.
The worst incident we had was one that landed in front of an outfielder and jumped probably 8ft back toward the infield. Momentum carried her forward as she lunged back out after it and she crashed..lol
All in all though, they really gamed up and took some shots. It hit chests and masks and they didn't seem to care. By about halfway into the second game the infield had started to get more of a read on things.