- Ivan Lendl was as great as John McEnroe and Bjorn Borg, and even--gasp--Pete Sampras.
To be honest, I'm torn on this one. But every statistical angle I've taken has led me to the above conclusion. One could argue that he was better than Sampras, but less regarded because far fewer Slams. But this is largely because Lendl overlapped with the primes of more all-time greats than any other great player: Connors, Borg, McEnroe, Wilander, Edberg, Becker, and even early prime Sampras, Agassi, and peak Courier.
- Serena Williams is not the WTA GOAT.
I know this is the popular opinion, but is mainly based on recency bias. Navratilova and Graf were both more consistently dominant. Serena's career is patchy; she had two or three truly dominant years, but mostly she had "partially great" years in which she looked overpowering during Slams, but didn't back it up with many other titles. I think a better argument is whether she or Evert belongs at #3 (or Court, if you consider pre-Open Era).
- Andy Murray is in the same "greatness tier" as Wilander, Edberg, and Becker.
Meaning, he's well above the better 2-4 Slam winners like Vilas, Nastase, and Courier (not to mention Wawrinka, Kuerten, etc). He went deep in most Slams during his prime and won a ton of big titles - more than all three of those guys above. His 3-8 Slam final record is indicative of a great player who had the misfortune of mostly facing three GOATs. That's the same number of Slam finals as Wilander (7-4) and Edberg (6-5) and one more than Becker (6-4).