Iga Swiatek kicked off her Doha campaign with a straight-sets win over Maria Sakkari, setting her sights on becoming just the second woman this century to capture the same title four years running.

It will be heard in April. Then, in August, Iga Swiatek, a former women’s No. 1, tested positive for a banned substance, trimetazidine (also known as TMZ). She said a medicine she took to help ...