Mikhail Aleksandrovich Kukushkin is a Russian-born Kazakhstani professional tennis player. Before 2008, he played for his country of birth, Russia.

Stanislas Wawrinka is a Swiss professional tennis player. He reached a career-high Association of Tennis Professionals (ATP) singles ranking of world No. 3 for the first time on 27 January 2014. His career highlights include three major titles, those being the 2014 Australian Open, 2015 French Open and 2016 US Open, where he defeated the world No. 1 player in the final on all three occasions. Other achievements include reaching the final of the 2017 French Open, winning a Masters 1000 title at the 2014 Monte-Carlo Masters, and reaching three other Masters finals. Representing Switzerland, Wawrinka won gold in doubles at the 2008 Beijing Olympics partnering Roger Federer, and was also pivotal in the Swiss team's victory at the 2014 Davis Cup.