Alexander Stanislavovich “Sasha” Bublik (Russian: Александр Станиславович Бублик; born 17 June 1997) is a Russian-born Kazakhstani professional tennis player. He has been ranked as high as world No. 34 in singles by the Association of Tennis Professionals (ATP), which he first achieved on 13 September 2021, and is the current Kazakhstani No. 1 player in singles. Bublik also has a career-high doubles ranking of world No. 47, attained on 8 November 2021. In November 2016, Bublik announced he would begin representing Kazakhstan after changing his citizenship from that of his home country of Russia. Though he has not won an ATP career title, he has been runner-up in four singles finals and one doubles final. Bublik has not made it past the third rounds at a Grand Slam in singles, but he achieved his highest doubles success at the 2021 French Open after he reached the finals with partner Andrey Golubev before the pair lost to Nicolas Mahut and Pierre-Hugues Herbert. At 1.96 m (6 ft 5 in), Bublik is known for his powerful serve and leads the 2021 ATP Tour in the number of aces served in the season thus far. He has also developed a reputation for his unpredictable trick shots and the occasional use of the underarm serve.
Aleksandar Vukic (Serbo-Croatian: Aleksandar Vukić, pronounced [aleksǎːndar ʋǔːkitɕ, alěksaːn-]; born 6 April 1996) is an Australian tennis player. Vukic has a career high ATP singles ranking of World No. 156 achieved in November 2021. He also has a career high ATP doubles ranking of World No. 422 achieved in July 2019. Vukic has won one ITF Futures singles title. Vukic made his main draw ATP singles debut at the 2018 Sydney International and his Grand Slam debut at the 2020 French Open, after qualifying for both.