Massive update after a long time without activity
All new players and new career highs since 2012 added
All players since 1976 according years end rankings in Binoxal s blog and a few other websites (http://tenistasargentinas.blogspot.fr/
I ll let appear the best y.e. ranking for players before 1986, do not hesitate to send me informations if they are accurate (= with reliable link) and i ll update the whole thing.