'I feel so terrible': Djokovic's Golden Slam bid is over
Alexander Zverev, of Germany, reacts after defeating Novak Djokovic, of Serbia, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Alexander Zverev, of Germany, reacts after defeating Novak Djokovic, of Serbia, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 06:44 AM EDT
Novak Djokovic, of Serbia, returns to Alexander Zverev, of Germany, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Novak Djokovic, of Serbia, returns to Alexander Zverev, of Germany, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 04:47 AM EDT
Novak Djokovic, of Serbia, walks off the court after losing a semifinal men's tennis match to Alexander Zverev, of Germany, at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Novak Djokovic, of Serbia, walks off the court after losing a semifinal men's tennis match to Alexander Zverev, of Germany, at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 06:07 AM EDT
Novak Djokovic, of Serbia, reacts during a semifinal men's tennis match against Alexander Zverev, of Germany, at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Novak Djokovic, of Serbia, reacts during a semifinal men's tennis match against Alexander Zverev, of Germany, at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 06:03 AM EDT
Silver medalists Marin Cilic, left, and Ivan Dodig, of Croatia, and gold medalists Mate Pavic, second from right, and Nikola Mektic, of Croatia, pose with their medals during a ceremony for the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Silver medalists Marin Cilic, left, and Ivan Dodig, of Croatia, and gold medalists Mate Pavic, second from right, and Nikola Mektic, of Croatia, pose with their medals during a ceremony for the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 08:39 AM EDT
Novak Djokovic, of Serbia, returns to Alexander Zverev, of Germany, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Novak Djokovic, of Serbia, returns to Alexander Zverev, of Germany, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 04:47 AM EDT
Alexander Zverev, of Germany, returns to Novak Djokovic, of Serbia, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Alexander Zverev, of Germany, returns to Novak Djokovic, of Serbia, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 04:47 AM EDT
Novak Djokovic, of Serbia, wipes sweat from his forehead during a semifinal men's tennis match against Alexander Zverev, of Germany, at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Novak Djokovic, of Serbia, wipes sweat from his forehead during a semifinal men's tennis match against Alexander Zverev, of Germany, at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 06:04 AM EDT
Alexander Zverev, of Germany, reacts after defeating Novak Djokovic, of Serbia, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Alexander Zverev, of Germany, reacts after defeating Novak Djokovic, of Serbia, during the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 05:59 AM EDT
The Serbian mixed doubles team of Novak Djokovic, right, and Nina Stojanovic leave the court after being defeated by a team from the Russian Olympic Committee during the semifinals of the tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

The Serbian mixed doubles team of Novak Djokovic, right, and Nina Stojanovic leave the court after being defeated by a team from the Russian Olympic Committee during the semifinals of the tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Jul. 30, 2021 09:25 AM EDT
Alexander Zverev, left, of Germany, speaks with Novak Djokovic, of Serbia, after defeating Djokovic in the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Alexander Zverev, left, of Germany, speaks with Novak Djokovic, of Serbia, after defeating Djokovic in the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 06:10 AM EDT
Alexander Zverev, of Germany, embraces Novak Djokovic, of Serbia, after defeating Djokovic in the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Alexander Zverev, of Germany, embraces Novak Djokovic, of Serbia, after defeating Djokovic in the semifinal round of the men's tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Jul. 30, 2021 06:12 AM EDT