STUTTGART, GERMANY - JUNE 13: Rafael Nadal of Spain celebrates after his match against Gael Monfils of France on day eight of Mercedes Cup 2015 on June 13, 2015 in Stuttgart, Germany. (Photo by Daniel Kopatsch/Bongarts/Getty Images)
STUTTGART, GERMANY - JUNE 13: Rafael Nadal of Spain celebrates after his match against Gael Monfils of France on day eight of Mercedes Cup 2015 on June 13, 2015 in Stuttgart, Germany. (Photo by Daniel Kopatsch/Bongarts/Getty Images)