'I will start to prepare for Miami' - Williams
Serena Williams says she will do all she can to be fit for the Miami Open after retiring from her third-round contest at Indian Wells.
The 37-year-old looked at her best for the first few games as she raced into a 3-0 lead against Spain's Garbine Muguruza.
However, she then called for the trainer after losing six in succession to the Spaniard.
She eventually retired with the score at 6-3 1-0 on what was her first outing since the Australian Open.
Williams admits she felt ill before the match but she has already turned her attention to the Miami Open.
She told reporters: "Before the match I did not feel great and then it just got worse with every second - extreme dizziness and extreme fatigue.
"By the score it might have looked like I started well, but I was not feeling at all well physically. I will focus on getting better and start preparing for Miami."
Muguruza will now face seventh seed Kiki Bertens, who beat Britain's Johanna Konta.
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