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 and Ivan Dodig, from left, of Croatia, gold medalists Mate Pavic, and Nikola Mektic, of Croatia, and bronze medalists Michael Venus and Marcus Daniell, of New Zealand, stand for the Croatian national anthem 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)

Silver medalists Marin Cilic, left, and Ivan Dodig, of Croatia, and gold medalists Mate Pavic, second from right, and Nikola Mektic, of Croatia, stand for the Croatian national anthem 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)

Mate Pavic, bottom right, and Nikola Mektic, of Croatia, return to Ivan Dodig, top left, Marin Cilic, of Croatia, during the final round of the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Bronze medalists Marcus Daniell and Michael Venus, from left, of New Zealand, gold medalists Nikola Mektic and Mate Pavic, of Croatia, and silver medalists Ivan Dodig and Marin Cilic, 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/Seth Wenig)

Bronze medalists Marcus Daniell and Michael Venus, from left, of New Zealand, gold medalists Nikola Mektic and Mate Pavic, of Croatia, and silver medalists Ivan Dodig and Marin Cilic, 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/Seth Wenig)

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 and Ivan Dodig, from left, of Croatia, gold medalists Mate Pavic and Nikola Mektic, of Croatia, and bronze medalists Michael Venus and Marcus Daniell, of New Zealand, stand for the Croatian national anthem 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 and Ivan Dodig, from left, of Croatia, gold medalists Mate Pavic, and Nikola Mektic, of Croatia, and bronze medalists Michael Venus and Marcus Daniell, of New Zealand, 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 and Ivan Dodig, from left, of Croatia, gold medalists Nikola Mektic and Mate Pavic, of Croatia, and bronze medalists Michael Venus and Marcus Daniell, of New Zealand, arrive for 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)

Mate Pavic, of Croatia, reacts after he and teammate Nikola Mektic defeated Ivan Dodig Marin Cilic, of Croatia, during the final round of 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 and Ivan Dodig, from left, of Croatia, gold medalists Mate Pavic and Nikola Mektic, of Croatia, and bronze medalists Michael Venus and Marcus Daniell, of New Zealand, stand for the Croatian national anthem 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)

Nikola Mektic, left, and Mate Pavic, right, of Croatia, embrace Ivan Dodig, second from left, and Marin Cilic, of Croatia, after defeating them in the final round of the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Marin Cilic and Ivan Dodig, of Croatia, return to Nikola Mektic and Mate Pavic, of Croatia, during the final round of the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Ivan Dodig and Marin Cilic, of Croatia, return to Nikola Mektic and Mate Pavic, of Croatia, during the final round of the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Mate Pavic, of Croatia, reacts after he and teammate Nikola Mektic defeated Ivan Dodig Marin Cilic, of Croatia, during the final round of the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Nikola Mektic, bottom left, and Mate Pavic, of Croatia, react after defeating Marin Cilic, top left, and Ivan Dodig, of Croatia, during the final round of the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Silver medalists Marin Cilic and Ivan Dodig, from left, of Croatia, gold medalists Mate Pavic and Nikola Mektic, of Croatia, and bronze medalists Michael Venus and Marcus Daniell, of New Zealand, stand for the Croatian national anthem 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)

Nikola Mektic, left, and Mate Pavic, of Croatia, react after defeating Ivan Dodig and Marin Cilic, of Croatia, during the final round of the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Marin Cilic, top left, and Ivan Dodig, of Croatia, prepare to return to Nikola Mektic and Mate Pavic, of Croatia, during the final round of the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Silver medalists Marin Cilic and Ivan Dodig, from left, of Croatia, gold medalists Mate Pavic and Nikola Mektic, of Croatia, and bronze medalists Michael Venus and Marcus Daniell, of New Zealand, stand for the Croatian national anthem 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)

Nikola Mektic, bottom right, and Mate Pavic, of Croatia, return to Marin Cilic, top left, and Ivan Dodig, of Croatia, during the final round of the men's doubles tennis competition at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)