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ROUEN, FRANCE - APRIL 07: Birgitte, Duchess of Gloucester attends the during the singles match between Lucas Pouille of France and Kyle Edmund of Great Britain on day one of the Davis Cup World Group Quarter-Final between France and Great Britain at Kindarena on April 7, 2017 in Rouen, France. (Photo by Clive Brunskill/Getty Images)

ROUEN, FRANCE - APRIL 07:  Birgitte, Duchess of Gloucester attends the during the singles match between Lucas Pouille of France and Kyle Edmund of Great Britain on day one of the Davis Cup World Group Quarter-Final between France and Great Britain at Kindarena on April 7, 2017 in Rouen, France.  (Photo by Clive Brunskill/Getty Images)

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ROUEN, FRANCE - APRIL 07: Birgitte, Duchess of Gloucester attends the during the singles match between Lucas Pouille of France and Kyle Edmund of Great Britain on day one of the Davis Cup World Group Quarter-Final between France and Great Britain at Kindarena on April 7, 2017 in Rouen, France. (Photo by Clive Brunskill/Getty Images)

ROUEN, FRANCE - APRIL 07:  Birgitte, Duchess of Gloucester attends the during the singles match between Lucas Pouille of France and Kyle Edmund of Great Britain on day one of the Davis Cup World Group Quarter-Final between France and Great Britain at Kindarena on April 7, 2017 in Rouen, France.  (Photo by Clive Brunskill/Getty Images)