Former number one Justine Henin feels like Iga Swiatek can improve quite a bit more as there is 'a whole technical dimension' that can be improved.
Iga Swiatek has achieved quite a bit so far in her career and it's unlikely that anybody is going to dethrone her any time soon. Henin understands that but she believes that the Polish player can improve even further. According to Henin, Swiatek will need to convince herself of that in order to unlock the new dimension:
“There is a whole technical dimension. She has a somewhat unusual technique. She has also been able to draw strength from that. You can see her arm speed and she has a lot of qualities. She's a player who moves very well on a fast surface, as she did at the US Open, but this is also linked to a lot of technical aspects in her game."
Henin expanded:
“Will she still be able to develop certain things without affecting the qualities she has already developed? That's what she needs to think about, along with her team. There’s also a feeling that the management of emotions, as we saw at the beginning of the season [in a defeat to Jessica Pegula at the United Cup], is still something complicated for her to achieve."
And more:
“But in any case, on this emotional management, I think that there is still a great margin for progression: on her game on fast surfaces, it will still remain a question this year [even if she crossed an undeniable threshold last year].”