LONDON, ENGLAND - JUNE 19: Milos Raonic of Canada (L) sits with his coach John McEnroe (R) during a practice session ahead of his final match against Andy Murray of Great Britan during day seven of the Aegon Championships at the Queens Club on June 19, 2016 in London, England. (Photo by Jordan Mansfield/Getty Images)
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Coach John McEnroe: 'I want to make a difference'
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Open Court: Tennis news 28 videos
LONDON, ENGLAND - JUNE 19: Milos Raonic of Canada (L) sits with his coach John McEnroe (R) during a practice session ahead of his final match against Andy Murray of Great Britan during day seven of the Aegon Championships at the Queens Club on June 19, 2016 in London, England. (Photo by Jordan Mansfield/Getty Images)
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Spain's Garbine Muguruza poses for photographers with her trophy one day after winning her women's final match against US player Serena Williams at the Roland Garros 2016 French Tennis Open on June 5, 2016 at Place de la Concorde in Paris. / AFP / MARTIN BUREAU (Photo credit should read MARTIN BUREAU/AFP/Getty Images)
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LONDON, ENGLAND - JUNE 22: A view of ball boys during the second round match between Rainer Schuettler of Germany and Feliciano Lopez of Spain on Day Three of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 22, 2011 in London, England. (Photo by Oli Scarff/Getty Images)
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LONDON, ENGLAND - JULY 12: Novak Djokovic of Serbia plays a forehand in the Final Of The Gentlemen's Singles against Roger Federer of Switzerland on day thirteen of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 12, 2015 in London, England. (Photo by Shaun Botterill/Getty Images)
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SEVILLE, SPAIN - DECEMBER 04: (L-R) Marcel Granollers, Fernando Verdasco, Feliciano Lopez, King Juan Carlos of Spain, team captain Albert Costa, Rafael Nadal and David Ferrer pose with the Davis Cup trophy during the third and last day of the final Davis Cup match between Spain and Argentina on December 4, 2011 in Seville, Spain. (Photo by Jasper Juinen/Getty Images)
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Arantxa Sanchez Vicario of Spain kissing the trophy after winning the ladies singles final of the French Open Tennis Championships held at Roland Garros, Paris, France during June 1989. She beat Steffi Graf (left) 7-6, 3-6, 7-5. (Photo by Bob Thomas/Getty Images).
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MELBOURNE, AUSTRALIA - JANUARY 30: Gordon Reid of Great Britain poses with the championship trophy after winning the Men's Wheelchair Singles Final match against Joachim Gerard of Belgium during the Australian Open 2016 Wheelchair Championships at Melbourne Park on January 30, 2016 in Melbourne, Australia. (Photo by Darrian Traynor/Getty Images)
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LEIPZIG, GERMANY - FEBRUARY 06: Angelique Kerber of Germany celebrates victory in her match against Timea Bacsinszky of Switzerland during Day 1 of the 2016 Fed Cup World Group First Round match between Germany and Switzerland at Messe Leipzig on February 6, 2016 in Leipzig, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images)
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