Juan Martin Del Potro came  close to hanging up his tennis racquet for good 18 months ago. In Glasgow he did what no man had ever done before - beating Andy Murray on home territory in the Davis Cup, as Argentina eventually knocked out the defending champions Great Britain.  After his win over Murray, he spoke to BBC 5 Live commentator and Tennis Podcast presenter David Law about the experience.  And, moments after Leonardo Mayer sealed victory with a win over Dan Evans, Law joined Murray’s former coach Miles Mclagan to discuss where the tie had been won and lost, o consider how long Murray might need away from the game to return energised, and to look ahead to the Davis Cup final between Argentina and Croatia.  The Tennis Podcast is produced in association with Telegraph Sport. See acast.com/privacy for privacy and opt-out information.