Dover High School swim coach Brenda Wherley holds out a picture of her protege, U.S. Olympic swimmer Hunter Armstrong, at the YMCA pool, where he began his swimming career, on the day of his Olympic debut at the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021.

Members of the Dover First Moravian Church, including parents Ryan and Edie Armstrong, pose for a portrait with U.S. swimmer Hunter Armstrong as he is on a videoconference on a phone, on the day of his Olympic debut the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021.

Lawns and buildings around a Wendy's restaurant are adorned with sings wishing U.S. swimmer, Hunter Armstrong, good luck on his Olympic debut in the 100m backstroke during the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021.

Family members of Demos Memneloum, first female Chadian judo athlete to ever qualify for the Olympics, watch Memneloum as she leads her country's contingent during the athletes' parade at the opening ceremony of the Tokyo 2020 Olympics, at their house in N'djamena, Chad July 23, 2021.

Residents and friends cheer on U.S. swimmer Hunter Armstrong from Dover High School as he competes in the 100m backstroke semi-final race during the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021.

Ryan Armstrong and Edie Armstrong video chat with their son U.S. Olympic swimmer Hunter Armstrong, after church services at Dover First Moravian Church, before Hunter goes to bed and prepares to compete in the men's 100m backstroke semi-final the following day at the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021.

Masakatsu Kitamura (64), Yumi Kitamura (61) and their grandson Tsurune (7) watch the Tokyo 2020 Olympics Opening Ceremony on TV at home on the day of theA startA of the Tokyo 2020 Olympics in Tokyo, Japan July 23, 2021A 

People watch the Tokyo 2020 Olympic Games opening ceremony displayed on a screen at the Trocadero Gardens, next to the Eiffel Tower, in Paris, France, July 23, 2021.

Edie Armstrong reacts when she hears that her son, U.S. swimmer Hunter Armstrong, will be moving on after just making it through the men's 100m backstroke preliminary race during the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021. "That gave me a small heart attack," Edie Armstrong said jokingly. "Don’t ever do that to me again Hunter."

An Olympic sign with Ohio State University student Hunter Armstrong's name stands in front of the Armstrong home, on the day of his Olympic debut at the 2021 Olympic Games in Dover, Ohio, U.S., July 25, 2021.

The Olympic rings adorn the mantle of the Armstrong family home on the day of U.S. swimmer Hunter Armstrong's Olympic debut at the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021.

People watch a TV broadcast of skateboarding competition during the 2020 Tokyo Olympic Games, in Tokyo, Japan, July 25, 2021.

Masakatsu Kitamura (64), Yumi Kitamura (61) and their grandson Tsurune (7) watch the Tokyo 2020 Olympics Opening Ceremony on TV at home on the day of theA startA of the Tokyo 2020 Olympics in Tokyo, Japan July 23, 2021A 

Edie Armstrong watches nervously from her home as her son, U.S. swimmer Hunter Armstrong, makes his Olympic debut in the men's 100m backstroke preliminary race during the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021.

Ryan Armstrong video chats with his son U.S. Olympic swimmer Hunter Armstrong, after church services at Dover First Moravian Church, before Hunter goes to bed and prepares to compete in the men's 100m backstroke semi-final the following day at the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021.

Masatsugu Kobori (61), Hideko Kobori (54), and their children Masataka (21), Masayasu (18) and Noriko (13), watch the Tokyo 2020 Olympics Opening Ceremony on TV at home on the day of theA startA of the Tokyo 2020 Olympics in Tokyo, Japan July 23, 2021A 

Dover High School swim coach Brenda Wherley poses for a portrait while holding a picture of her protege, U.S. Olympic swimmer Hunter Armstrong, at YMCA where he began his swimming career, on the day of his Olympic debut at the 2021 Olympic Games, in Dover, Ohio, U.S., July 25, 2021.

Karen Armstrong reaches to touch displayed on a screen shoulder of her grandson, U.S. swimmer Hunter Armstrong, before he makes his Olympic debut in the men's 100m backstroke preliminary race during the 2021 Olympic Games, while his family watches from home in Dover, Ohio, U.S., July 25, 2021. Before every race, in person or on screen, Karen Armstrong touches the shoulder of her grandson. “Not only is he young chronologically,� Karen Armstrong said. “He’s also young physically.� While making the 2021 Olympics were a bit of a surprise, his family is sure he'll be in his prime for the 2024 Olympics in Paris.

Lawns and buildings around a school are adorned with sings wishing U.S. swimmer, Hunter Armstrong, good luck on his Olympic debut in the 100m backstroke during the 2021 Olympic Games in Dover, Ohio, U.S., July 25, 2021.

Tokyo 2020 Olympics - Tennis - Women's Singles - Round 1 - Ariake Tennis Park - Tokyo, Japan - July 25, 2021. People watch first round matches at Ariake Tennis Park.