Not sure that’s a great example. The cartoon is mocking some guy called Wilson. The tennis player is generic/interchangeable. In most cartoon styles, the ‘background’ person is drawn generically, the mocked person is the one that’s lampooned by (usually) both image and words. Have a look at the depiction of Wilson. Thin neck, goggly eyes etc.
Plenty of cartoons when I was growing up depicted Macenroe as a baby with mouth bigger than his body, frizzy hair to the moon, dummy bouncing out.
I guess the point is that mocking people by both image and words is pretty much what cartoonists do. I can understand that some think you need to be more careful in some areas, but I find that dangerous too.
If you can mock a Macenroe or John Howard or julia Gillard by exaggerating their features, then it shouldn’t be necessarily inherently racist to depict someone unflatteringly because they happen to be black.
Male I am, privileged - maybe (not like serena though!). White -well you decide- half Chinese and half Italian, growing up in the 60s and 70s in totally white bread (initially country) communities - I had a bucketful of racism directed at me. When kids snigger and mock when they see your dad, or gather round and point at you singing ‘Ching Chong chinaman’ you get a certain sensitivity to actual racism. I just dislike when that card gets pulled in a way that looks for offence.