Simona Halep of Romania hits a return against Caroline Garcia of France during the WTA Finals tennis tournament in Singapore on October 23, 2017. [Photo/AFP]
Simona Halep and Caroline Wozniacki both won on a day of few surprises at the Madrid Open. World number one Halep is holding off a challenge from Wozniacki in Spain, with the Dane sure to climb to the top of the rankings if she out-performs her rival this week.