Rennae Stubbs is the greatest women’s doubles player Australia has ever produced—playing on the tour for nearly 20 years, reaching No. 1 in the world, winning 60 titles, 4 of them Grand Slam tournaments.

She’s a tennis analyst now for ESPN, and she was talking with me, over a late-afternoon coffee at the Australian Open, about a Grand Slam final she and her doubles partner, fellow Australian Samantha Stosur, lost to Venus and Serena Williams, at Wimbledon in 2009. Stubbs brought up, as all players (and commentators) do, Serena’s power, her depth of shot, the unreadability of her serve.