| Robert Spiess | |
| Fullname: | Robert Cleon Spiess |
| Birth Date: | 17 February 1891 |
| Birth Place: | Moscow, Russia |
| Turnedpro: | 1910 (amateur tour) |
| Retired: | 1936 |
| Singlesrecord: | [1] |
| Singlestitles: | 6 |
| Wimbledonresult: | 1R (1914) |
| Wimbledondoublesresult: | QF (1914) |
Robert Cleon Spiess (17 February 1891 - 22 October 1982) also known as Robert Spies (anglicized name) was a German tennis player.[2] He competed in two events at the 1912 Summer Olympics in Sweden.[3] He was a quarter finalist in the men's doubles at the 1914 Wimbledon Championships partnered with Luis Maria Heyden.[4] His biggest singles title wins were at the German International Covered Court Championships which he won two times in 1920 and 1926, and the German National Championships in 1912.[1] He was active from 1910 to 1936 and won 6 career singles titles.[1]
Spiess played his first tournament in 1910 at the Geneva Spring Tournament.[1] The same year he won his first title at the Caux International in Montreux against A. Félix Poulin.[1] He won the German National Championships in 1912, and German International Covered Court Championships twice in 1920 and 1926.[1] He also won the Championships of Bremen in 1924.[1] He won his final title at the Bremen Closed Championships in 1936.[1]
He also took part in the 1914 Wimbledon Championships losing in the first round to Frank Jarvis,[5] whilst in England he also played at the Northern Championships where he lost in round two to Stanley Doust.
Additionally he was also a losing finalist at the Les Avants Championship in 1910, defeated by Val Miley,[1] the Norderney Spa Championship in 1911 beaten by Carl Lange,[1] the Championship of Braunschweig losing to Heinrich Schomburgk,[1] and the Saint-Étienne International where he lost to Friedrich Wilhelm Rahe.[1]