Roger Federer and Serena Williams typically stroll regally into round 2 at Slams, but on Tuesday, they stuttered before advancing.Afterwards, David Law and Matt Roberts convened to discuss their progress, that of Angelique Kerber, and the impressive return of 7 British players into round 2 of Wimbledon.The bizarre, bewildering performances of Bernard Tomic and Nick Kyrgios are discussed, as is the mouth-watering prospect of Kyrgios vs. Rafael Nadal.News of Andy Murray playing mixed doubles with Serena Williams together broke moments after recording, so will be covered in tomorrow's podcast.The Tennis Podcast is uploaded nightly during Wimbledon and all of the Grand Slam tournaments, in association with Telegraph Sport.We also produce daily e-mail newsletters, with our match of the day predictions. To sign up - http://po.st/TTP_Newsletter. See acast.com/privacy for privacy and opt-out information.