Williams gave her statement that she and her coach already discussed her pulling out of the game because of her injury, as she needed more time to get healed properly.
She picked up the injury during her semi-final defeat at the US Open earlier this month.
The legendary tennis player was scheduled to play her second-round match against Bulgaria’s Tsvetana Pironkova on Wednesday and was aiming to equal Margaret Court’s all-time record of 24.
“After I warmed up, though it was a very short warm-up I talked to my coach and I was like, ‘What do you think?
“We both thought about it and we really realised that it likely wasn’t the best for me to play today.