agreed 100%. He was stating a fact and not being insulting. And there is no reason to be insulted.
It's kind of like the Pound 4 Pound debate for fighters as we use that to gauge the ability of the fighter not based on size. As great as Floyd Mayweather is Wladimir Klitschko would KILL him in the 1st round.
In that sense I think pound 4 pound or racket 4 racket in this case Serena Williams is the greatest tennis player of all time. My apologies to Roger Federer...you are a close 2nd.
Exactly. Shame on that NPR interviewer for baiting him.