David and Catherine convene on The Tennis Podcast to discuss another rain-hit day at Roland Garros.Before play was suspended prematurely, a huge upset was brewing on Court Philippe Chatrier when the free-swinging Diego Schwartzman took the first set against Rafael Nadal.That’s right. Nadal lost a set. On clay. At Roland Garros. It ended his streak of 38 consecutive sets won on the Parisian clay. Schwartzman also led by a break in the second set and David and Catherine are full of praise for his aggressive game-plan.Nadal eventually swung the momentum back in his favour, but to what degree was he saved by the rain? And why did he tape up his wrists? Can Schwartzman possibly win another two sets tomorrow?Elsewhere on Wednesday, the women’s semi-final line-up was completed as Garbiñe Muguruza demolished an erratic Maria Sharapova and Simona Halep displayed great mental fortitude to come from behind and beat Angelique Kerber.Muguruza and Halep will now meet in a match that will determine who ends the French Open as the World No.1. But who will win? David and Catherine aren’t sure. But it promises to be an absolute belter, doesn’t it?There’s also a preview of the intriguing contest between Madison Keys and Sloane Stephens. Keys has never won a set against Stephens, but they’ve never played on clay. Who will that favour?There will be daily editions of The Tennis Podcast throughout the French Open, in association with Telegraph Sport. It is presented by Catherine Whitaker (Eurosport) and David Law (BBC 5 Live, BT Sport) See acast.com/privacy for privacy and opt-out information.