Re: Was Razzano's win over Serena the most stunning upset ever in women's tennis!?
I feel like all of these other losses have an excuse:
Justine had that cytomegalovirus or whatever against Garbin
Steffi began to aggravate a back injury.
Ivanovic's form indicated that she was going to be upset.
Hingis was still hungover from that Roland Garros debacle.
Serena's loss seemingly comes out of the blue, unless she's hiding an injury or something. So yes, Serena's loss probably is the biggest upset in the past couple of decades.
Serena , Venus , Petra , Ana 
Simona, Vika , Angie, Sveta, Garbiñe
Kim , Mahree , Monica , Dokic, Sandrine, Jie