Serena Williams went out of the Australian Open as a back injury hindered the five-time champion against a rampant Ana Ivanovic.
The Serb came back from a set down to win 4-6 6-3 6-3 ? her first ever victory over Williams in five attempts.
There had been reports before the match that Williams had a back problem, and so it proved.
?I almost pulled out. I?m such a competitor, I probably should have,? said the world number one.
?I don?t want to blame anything. I feel like Ana deserves all the credit. I feel she played unbelievably today. I think she went for her shots.?
Williams revealed that she did not know the exact nature of her injury but had been dealing with it for ?a few days?.
She added: ?It?s not anything that?s life threatening or anything. I feel like it will get better. I just need a couple days off.
?Unfortunately I don?t have that in a Grand Slam.?