The 23-year-old has confirmed she is suffering from the same long-term condition as rival Caroline Wozniacki.
Naomi Osaka maintained her chance of a second consecutive title in Indian Wells with a comprehensive straight-sets win over Danielle Collins.
On a very hot day in Melbourne (the roof was closed mid-match for the heat) Kvitova defeats Danielle Collins and advances to her third Major final
Danielle Collins reaches the semifinal on her maiden main draw Australian Open. Another crushing loss for Pavlyuchenkova
Everything you need to know about the surprise Australian Open semi-finalist.
Angelique Kerber is out of the Australian Open after only winning two games against a very good Danielle Collins.
Caroline Wozniacki booked her place in the second round of French Open 2018 with a comfortable 7-6 6-1 win over Danielle Collins.
When growing up on public tennis courts was a blessing is disguise for the 24-year-old.