WBGT affecting the Australian Open outcome?
January 28, 2009; Svetlana Kuznetsova playing in the Australian Open against Serena Williams became upset when officials decided to close the roof after the first set. Officials determined it was necessary to reduce the heat conditions by eliminating the effect of direct sunlight (one of the factors used to determine the WBGT index reading) or “solar load” on the tennis court. During the first set Williams struggled in the excessive heat against Kuznetsova and Kuznetsova felt that the time it took to close the roof allowed Serena to recover from the blistering heat.
This was also covered in the Sporting News: http://www.sportingnews.com/blog/the_sporting_blog/entry/view/16840/aussie_open_continues_hot_streak