Forbes recently published a list of the top female earners in spot and tennis players once again dominated but it wasn't the number one on top but another.
Naomi Osaka finished first despite not playing many tennis matches and it's mostly due to her numerous endorsements. The current number one Iga Swiatek earned the most on the court but she didn't earn that much from endorsements. It's something she saw and she shared some thoughts about it when asked:
“I’m glad to see that ranking. Money isn’t my motivation but the tricky thing is I earned it really on court & other players earned it mostly from endorsements so there’s a difference. I feel I can still expand my business a bit."
There is certainly an edge present there with Swiatek pointing out that her earnings mostly came from tennis as opposed to something else. She's indirectly pointing out her superiority over the Tour in terms of results.