Rinderknech played college tennis at Texas A&M University. Rinderknech made his Grand Slam main draw debut as a wildcard at the 2018 French Open in doubles partnering Florian Lakat. He also entered as a wildcard the first rounds of the 2020 French Open on his singles main draw debut and doubles main draw partnering with Manuel Guinard and reached the second round in doubles.
Kwon has represented South Korea in the Davis Cup. He was first nominated to the team for the 2017 Davis Cup, making his debut against Uzbek tennis player Denis Istomin. Kwon made his tour-level and Grand Slam debut after winning the 2018 Asia-Pacific Wildcard Playoff for the main draw of the 2018 Australian Open.