Nicolai Budkov Kjær (born 1 September 2006) is a Norwegian professional tennis player. He has a career high ATP singles ranking of No. 670, achieved on 14 October 2024. He also has a career-high ITF junior combined ranking of No. 1, achieved on 15 July 2024.
Nicolai Budkov Kjær was born to a Norwegian father and an Estonian mother.[1] He lives in Bygdøy, Oslo, and trains at Oslo Tennisarena and Wang Toppidrett.[2][3]
In February 2024, he replaced Dominic Thiem at the Ultimate Tennis Showdown in Oslo, the ninth edition of the tournament.[7][8] The following month, he won his first professional title at the $15k Antalya Series. He subsequently made his debut in the top 1000 of the ATP rankings at No. 897.[9][10] He was the first Norwegian to do so since Casper Ruud in 2016.
Kjær represents Norway at the Davis Cup where he has a W/L record of 1–2. He made his debut in September 2023 against Peru.[11] In September 2024, Kjær recorded his first Davis Cup victory, with a win over Portuguese Jaime Faria, who was ranked 157 at the time.
Norway
Niels Visker
Yanaki Milev
Rafael Jódar
Joel Schwärzler
Federico Cinà 
Rei Sakamoto
indicates the outcome of the Davis Cup match followed by the score, date, place of event, the zonal classification and its phase, and the court surface.
1–4; 16–17 September 2023; Lawn Tennis de la Exposición, Lima, Peru; World Group I play-offs; clay surface
Peru
