Athanasios "Thanasi" Kokkinakis is an Australian professional tennis player. He has been ranked as high as world No. 65 in singles by the ATP, achieved on 6 November 2023. He has won one ATP Tour title in singles and produced his best Major singles performance by reaching the third rounds at the 2015 and 2023 French Open. Kokkinakis also has a career-high doubles ranking of world No. 15 attained on 21 November 2022 after winning the 2022 Australian Open and reaching the semifinals of the 2022 Miami Open with countryman Nick Kyrgios.
As a junior, Kokkinakis was ranked as high as No. 10 in the world. He won one junior Grand Slam title, the doubles title at the 2013 Wimbledon Championships with partner Nick Kyrgios, and was the runner-up in two additional junior Grand Slam singles finals that same year. As a professional, Kokkinakis broke into the top 100 for the first time in 2015, during which he won one title on the ATP Challenger Tour and made the fourth round of an ATP Masters 1000 tournament for the first time at the 2015 Indian Wells Masters. After an injury-plagued 2016, he reached his first two ATP Tour finals the next year, when he won the 2017 Brisbane International doubles title with Jordan Thompson but lost at the 2017 Los Cabos Open in singles to Sam Querrey. In 2018, Kokkinakis won two additional Challenger titles and ended the year having re-entered the top 150.
However, over the next two years, further injuries prevented him from regularly competing on the professional circuit, but he made his return in 2021 and he reached two Challenger finals, of which he won one. He continued his comeback in 2022 and appeared in his first ATP Tour final in five years at the 2022 Adelaide International 2, in which he prevailed in front of a home-town audience to secure his maiden ATP Tour singles title. He then won the Australian Open doubles title partnering Kyrgios, and the pair competed in the year-end championships.
