Top seed Dimitrov retires in his opening match at the Winston Salem Open, after experiencing dizziness and shortness of breath in the second set, he decided to pull the plug on his match after a visit from the doctor. A new normal is taking hold in the wo

Top seed Dimitrov retires in his opening match at the Winston Salem Open, after experiencing dizziness and shortness of breath in the second set, he decided to pull the plug on his match after a visit from the doctor. A new normal is taking hold in the wo