Angelique Kerber and Simona Halep are on a collision course. The quarterfinals are set at the Western & Southern Open and Kerber is three wins away from taking over the No.1 ranking. Hear from both Kerber and Halep as they prepare for the business end of a fine week in Cincinnati. Subscribe to the podcast on iTunes, Stitcher, TuneIn or on any podcast app of your choice to ensure you never miss an episode when they go live. Reviews are always helpful, so if you like what you've heard so far, leave us one. You can also get new episode alerts by following us on Twitter @WTA_Insider.