To be honest, while I like Li Na and was rooting for her, I couldn't shake the feeling that if she was really that hurt, she should have stopped playing. If its not career-threatning injury, she should not be able to get treatment and just move on. Those MTOs have become a joke. Players are now using them as a bonus rather than a real treatment to a problem. It:
a) Gives them a nice treatment
b) Stops the opponent's momentum and annoys them
c) allows them to get a breather
Nadal started the fiasco, and now its out of control.