PARIS, FRANCE - MAY 28: (L-R) Coach Andre Agassi and Marco Djokovic (brother) look on as Novak Djokovic of Serbia practices on day one of the 2017 French Open at Roland Garros on May 28, 2017 in Paris, France. (Photo by Julian Finney/Getty Images)
PARIS, FRANCE - MAY 28: (L-R) Coach Andre Agassi and Marco Djokovic (brother) look on as Novak Djokovic of Serbia practices on day one of the 2017 French Open at Roland Garros on May 28, 2017 in Paris, France. (Photo by Julian Finney/Getty Images)