Coaches corner

Coach David Ross hugs Canada's Rosannagh MacLennan after she won the gold medal for the women's trampoline final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Friday, Aug. 12, 2016. (AP Photo/Julio Cortez)

Netherlands' Sanne Wevers watches for final scores with her father and coach Vincent Wevers during the artistic gymnastics women's apparatus final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Monday, Aug. 15, 2016. (AP Photo/Julio Cortez)

Poland's coach Talant Dujshebaev gestures during the men's preliminary handball match between Germany and Poland at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, Aug. 9, 2016. (AP Photo/Matthias Schrader)

Sweden's coach Ola Lindgren covers his face at the bench during the men's preliminary handball match between Sweden and Brazil at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Monday, Aug. 15, 2016. (AP Photo/Matthias Schrader)

United States' Simone Biles is comforted by her coach Aimee Boorman after her performance on the balance beam during the artistic gymnastics women's apparatus final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Monday, Aug. 15, 2016. (AP Photo/Rebecca Blackwell)

Finland's boxing coach Maarit Teuronen, right, reacts as Finland's Mira Potkonen won a women's lightweight 60-kg quarterfinals boxing match against Ireland's Katie Taylor at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Monday, Aug. 15, 2016. (AP Photo/Frank Franklin II)

Stig-Andre Berge, of Norway, bottom, celebrates with coaches after winning a bronze medal in men's Greco-Roman wrestling 59-kg competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Sunday, Aug. 14, 2016. 126(AP Photo/Robert F. Bukaty)

Gong Jinjie of China, right, and Sandie Clair of France, left, wait with their coaches to compete in the women's Keirin first round cycling repechage at the Rio Olympic Velodrome during the Summer Olympics in Rio de Janeiro, Brazil, Saturday, Aug. 13, 2016. (AP Photo/Pavel Golovkin)

Taiwan's Tan Ya-ting. right, celebrates with her coach during an elimination round of the individual archery competition at the Sambadrome venue during the 2016 Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016. (AP Photo/Alessandra Tarantino)

A coach hugs Japan's Kohei Uchimura after seeing the final scores that placed him on gold during the artistic gymnastics men's individual all-around final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Wednesday, Aug. 10, 2016. (AP Photo/Julio Cortez)

Switzerland's Martina van Berkel speaks to a coach ahead of the swimming competitions at the 2016 Summer Olympics, Tuesday, Aug. 9, 2016, in Rio de Janeiro, Brazil. (AP Photo/Lee Jin-man)

Britain's Ruby Harrold is congratulated by a coach after a performance during the artistic gymnastics women's team final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, Aug. 9, 2016. (AP Photo/Julio Cortez)

Brazil's Juan Goncalves Nogueira, left, is comforted by his coach after losing to Russia's Evgeny Tishchenko in a men's heavyweight 91-kg preliminary boxing match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Monday, Aug. 8, 2016. (AP Photo/Jae C. Hong)

Britain's Galal Yafai, left, is comforted by his coach after his loss to Cuba's Joahnys Argilagos in a men's light flyweight 49-kg preliminary boxing match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Monday, Aug. 8, 2016. (AP Photo/Jae C. Hong)