Re: Legend Hingis admits she is envious of Sharapova's career slam
English translated but i found this bit interesting.
You have completed a career double-double and returned to the WTA-Tour, but the last time - only in doubles. On the single thought?
- No. I'm not interested just play - you want to achieve serious results. I do not feel that I have something to get personal discharge. Tennis, including women, recently became Athletic. Physical strength and had not been my trump card,