| Reino Nyyssönen | |
| Birth Date: | 12 February 1935 |
| Death Date: | January 2023 (aged 87) |
| Plays: | Right-handed |
| Wimbledonresult: | 2R (1960, 1962) |
| Usopenresult: | 4R (1962) |
| Wimbledonmixedresult: | QF (1961) |
Reino Nyyssönen (12 February 1935 – January 2023) was a Finnish tennis player.[1]
Nyyssönen was a native of Turku but it was in Sweden that he took up the sport of tennis, after coming to the country as a World War II child evacuee. When he returned to Finland he continued his tennis development in Kotka.[2]
A Davis Cup player for Finland from 1955 to 1964, Nyyssönen won a total of 35 national championships, including six indoor and seven outdoor singles titles. Amongst his best grand slam performances, he made the mixed doubles quarter-finals at the 1961 Wimbledon Championships and the singles fourth round at the 1962 U.S. National Championships.[3]
Nyyssönen was later the national tennis coach for Denmark.[2]