although i think the players are doing the right thing so they don't get over tired i still agree with you that they have a responsibility. it's something where no matter what they do they are doing the right thing but also the wrong thing.
Go the aussies! stosur!!!
and good luck russians: dementieva, safina, kirilenko, sharapova, kuznetsova, bovina, zvonareva, dushevina.
also good luck to: azarenka, lucic, sprem, vakulenko, vaidisova, safarova, ivanovic, groenefeld, mirza, krajicek, kvitkova, larcher de brito, lisicki.