Simona Halep. Pic/AFP

World number one Simona Halep cruised past Wang Qiang of China 7-5, 6-1 in the fourth round of the WTA Tour's Indian Wells tournament on Tuesday. Halep, who is one of two former champions left in the draw, is now 17-1 on the season having already won a title in both singles and doubles at Shenzhen, China.