World number ten Caroline Wozniacki has become the latest star name to pull out of the Qatar Open, one of three players to withdraw from the injury-hit tournament on Tuesday.
The Dane was said to be suffering from a “viral illness”, according to a statement from tournament organisers in Doha.
Wozniacki was due to give a press conference later on Tuesday.
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She was joined on the sidelines by world number 14, Australia’s Ashleigh Barty, and number 19, Caroline Garcia of France, who also both announced they could not play in Doha.
Barty cited a hip injury and also announced she would not play in the Dubai Tennis Championships later this month.
“Unfortunately I have withdrawn from Doha and Dubai with a minor hip injury,” said Barty.
“After consulting with the WTA doctors, I have taken their advice to have a few weeks rest.”
No reason was given for Garcia’s absence.
It completed another bad day for organisers who lost their main attraction on the eve of the tournament, Naomi Osaka.
The world number one and recently-crowned Australian Open champion said just days before the start of the tournament she would not take part because of a back injury.
On Tuesday, the Japanese star also surprisingly announced she would no longer be working with her coach, Sascha Bajin.
Her place as top seed in Doha was taken by the woman she replaced as the world number one, Romania’s Simona Halep.