Re: Ana Konjuh
I think it is too much saying Ana is better than Donna. They are playing completely different levels at the moment, such a big difference in seniors and juniors. Ana has good strength in her body, so she can bully most of the juniors easily, but whether it can transition to seniors is yet to be seen.
Reason for Donna's early success in seniors is she can absorb and redirect pace really well. I think Ana is a different kind of player.
For predictions, I would say Ana will not have the success Donna has had now, but in the future when she develops her game more like around 18.