In case you had forgotten, she got completely naked for one of those ESPN body thingies in 2017, then put on her clothing and defeated Venus in straight sets in the WTA Championship finals that year. She went on to win a major (Australian Open) the following year. She is inactive on the tour now, but at one time, circa 2010-2011, she was ranked #1 in women’s singles for many, many weeks.
Is this a current pic? Cuz it’s fairly obvious those are implants. You can’t credit the bra for making them look like that since the bra is just paint. Compare the size to the ESPN nude pics. For sure she got implants, and I don’t think she would have gotten them if she intended to ever play competitive tennis again.