okay here is my speculations why old sis lacks motivation to play tennis anymore. Maybe she just doesn't want to train her ass 24/7 just to be another time beaten by lil sis in GS final? Yeah she has beaten Serena at Nasdaq, but we all know that Serena at GS and at any another tournament are two very, very different things. It is sad and ironic at the same time that for her it were easier to prove that she was the best one in the world at one point in her life than to prove that she is better than her lil sis now.
ok for example look at her schedule: Istanbul Cup, Sweden... It seems that she is not playing tennis to become No.1 anymore. But to travel around the world, visit different countries, examine different cultures (remember Thailand?)
Whatever is going on in her lovely head, I would not bury her yet!!!! We all know the talent is there, and thats much more than we knew about Lindsey. When the Queen is ready, she will reclaim her throne, I think she already let Sweet Rena, know that Right now, the ladies of the WTA better try and figure out how to stop another Serena Slam.