Lendl, Borg, McEnroe, I dunno, some tennis expert can chime in, that was before my time. I can't speak too much to Tiger or Jack either because golf bores me to death.

I think in a team sport you still look at individual dominance. Were the TEAMS of Ruth or Bonds or Wilt or Brown unbeatable? No. Were they unstoppable? Yes. 99 obviously thought the game at another level, Mario had more physical talent and much of the smarts and Orr just did it all at all times when he was healthy.