A wooden-spoon list ranks all players in the draw of a tennis-tournament into a total order, based purely on who beats whom in the tournament. Wooden-spoon theory formalises the intuition that it's better to lose to a player who goes on to do well in the tournament than to lose to a player who gets beaten in the next round.
A rigorous explanation of the theory can be found at my website, along with the wooden-spoon lists for women's singles draws at the Majors since 2000.
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Here's the wooden-spoon list for the women's singles at Wimbledon 2007: 1. VENUS WILLIAMS (23) 2. MARION BARTOLI (18) 3. ANA IVANOVIC (6) 4. JUSTINE HENIN (1)
Here's the wooden-spoon list for the women's singles at the Australian Open 2007: 1. Serena Williams 2. MARIA SHARAPOVA (1) 3. NICOLE VAIDISOVA (10) 4. KIM
Andrew, I'm not sure if you're only keeping track of the "winners" at slam events, but I've been keeping track of this stuff for ages at the regular tour stops