ROME (Reuters) - Romanian Simona Halep will extend her stay as world number one after being handed a walkover into the Italian Open quarter-finals when American Madison Keys withdrew injured on Thursday.
Halep needed to reach at least the quarter-finals and go further than world number two Caroline Wozniacki to retain the top-ranking going into the French Open.
Keys, runner-up in Rome in 2016, was unable to take to court because of a right rib injury.
"I felt my rib in my match yesterday and after trying to warm up this morning it was still painful," she said.
(Reporting by Martyn Herman; Editing by Toby Davis)