The American elected for surgery to his right elbow and hopes to be back on court soon.
The quartet join Iga Swiatek and Aryna Sabalenka in the field, with two spots remaining unclaimed.
The rising Chinese is hungry for her next shot at Sabalenka.
The Grand Slam king is motivated to continue playing in 2025.
The Italian dishes on the reasons for his rise.
"Every shot, he's got in the game," Novak Djokovic said of world No. 1.
A list of the Olympic medalists since tennis returned to the games in 1988.
