Xenakis
Hall of Fame
Interesting video graphic article thingy from the NYT here on Fed's footwork (not seen it posted before, sorry if so, might be worth reposting anyway, possibly.)
http://www.nytimes.com/interactive/2009/08/31/sports/tennis/20090831-roger-graphic.html?ref=tennis
http://www.nytimes.com/interactive/2009/08/31/sports/tennis/20090831-roger-graphic.html?ref=tennis