Lizzie Miller (walk on at UW, played HS at De Pere) played (and beat) Jordan Ellenberg (a UW math prof) in one-on-one. You can see the highlights here:
http://www.pbs.org/wgbh/nova/physics/pr ... mbers.html

It starts about the 10:30 mark. I personally recommend watching the whole thing, it's pretty neat (and while I'm giving out random recommendations, I recommend reading Ellenberg's math books and articles, he's very good at explaining).