Germany's Angelique Kerber 

Indian Wells (US): Angelique Kerber won't celebrate her return to World No. 1 with an Indian Wells title after a shock fourth-round exit on Tuesday at the hands of Elena Vesnina. Russia's 14th-seeded Vesnina toppled the second-seeded German 6-3, 6-3 to book a quarter-final clash with seven-time Grand Slam champion Venus Williams.