It's often about the legends in the men's tennis world, but have people ever thought about what it was like in women's history? Steffi grave was virtually unbeatable in the 90s, was dethroned by Hingis and then came the Williams sisters. Unfortunately, those generations ran into each other, so that no real showdowns were forthcoming.
You forgot about another top tennis player, Monica Seles.
Between 1990-1993 she was the best tennis player in the world and Steffi Graf might never have become the best and won so many GS and other tournaments that Monica Seles career was not tragically interrupted after a fan attack at a tournament in Germany.
In fact, it is a pity that after Serena we do not have a great champion in women's competition, because that is why the interest in women's tennis is falling.
It seems to me that Osaka has a predisposition to become a great champion if she overcomes her psychological barriers.