Highlights: Sam Groth (AUS) v John Isner (USA)

Watch highlights of the opening rubber of the Davis Cup by BNP Paribas World Group first round tie between Australia and USA. Click here to subscribe - Davis Cup by BNP Paribas is the largest annual international team competition in world sport. This prestigious event, which is one of the cornerstones of the tennis calendar, gives players the chance to represent their country in an otherwise individual sport.