Danielle Collins opens up on her battle with endometriosis

World No. 31 Danielle Collins opened up about her battle with endometriosis, a condition with which she has been battling for the better part of her adult life. Endometriosis is a condition that causes intense abdominal pain and menstrual irregularities."I’ve always had painful periods but I remember a couple of years ago being woken from my sleep and immediately needing to drive to the pharmacy to buy anti-inflammatories just to be able to get through the night," Collins told Eurospo