Rafael Nadal of Spain attends a press conference after pulling out of the singles semifinal match of the Rolex Paris Masters 1000 held at the AccorHotels Arena in Paris, France Nov. 2, 2019. (Photo by Aurelien Morissard/Xinhua)

Rafael Nadal of Spain attends a press conference after pulling out of the singles semifinal match of the Rolex Paris Masters 1000 held at the AccorHotels Arena in Paris, France Nov. 2, 2019. (Photo by Aurelien Morissard/Xinhua)

Rafael Nadal of Spain attends a press conference after pulling out of the singles semifinal match of the Rolex Paris Masters 1000 held at the AccorHotels Arena in Paris, France Nov. 2, 2019. (Photo by Aurelien Morissard/Xinhua)

Rafael Nadal of Spain attends a press conference after pulling out of the singles semifinal match of the Rolex Paris Masters 1000 held at the AccorHotels Arena in Paris, France Nov. 2, 2019. (Photo by Aurelien Morissard/Xinhua)

Rafael Nadal of Spain attends a press conference after pulling out of the singles semifinal match of the Rolex Paris Masters 1000 held at the AccorHotels Arena in Paris, France Nov. 2, 2019. (Photo by Aurelien Morissard/Xinhua)