Nicholas Hilmy Kyrgios ( KIRR-ee-oss; Greek: Νικόλαος Χίλμυ Κύργιος, romanized: Nikólaos Chílmi Kírios; born 27 April 1995) is an Australian professional tennis player. Kyrgios has been ranked as high as world No. 13 in singles by the Association of Tennis Professionals (ATP), achieved on 24 October 2016. He has won seven ATP Tour singles titles, including the 2019 and 2022 Washington Open, and reached eleven finals, most notably a major final at the 2022 Wimbledon Championships, and a Masters 1000 final at the 2017 Cincinnati Masters. In doubles Kyrgios has a career-high ranking of world No. 11, achieved on 7 November 2022, winning a major doubles title at the 2022 Australian Open partnering Thanasi Kokkinakis. He has reached three major singles quarterfinals (at 2014 Wimbledon, upsetting then-world No. 1 Rafael Nadal en route, the 2015 Australian Open, and the 2022 US Open, upsetting then-world No. 1 Daniil Medvedev en route).
Kyrgios is only the third player, after Dominik Hrbatý and Lleyton Hewitt, to have beaten each one of the Big Three (Novak Djokovic, Roger Federer, and Rafael Nadal) the first time he played against them. Kyrgios is often described as a 'polarising player' because of his 'unique, unfiltered and unapologetic personality' which goes alongside his 'on-court brilliance and audacious shot-making' in both singles and doubles.
In his junior career, Kyrgios won the singles event at the 2013 Australian Open and the doubles events at the 2012 French Open, 2012 Wimbledon Championships and 2013 Wimbledon Championships.