Simona Halep is back as the year-end No. 1 for the second year in a row, despite a back injury that doctors say could lead to a long-term problem.
Halep, who won her first major title at this year's French Open, clinched the year-end top tennis ranking on Monday but may be forced to pull out of the upcoming Kremlin Cup and the season-ending WTA Finals because of a herniated disk.
"I haven't practiced 100 percent yet but today, tomorrow, I will do close to 100," Halep said in a conference call, "and I will be able to know better the next day.
"The doctor told me it's nothing about the surgery, but if I will keep playing there is a risk of...