Alejo Domingo Russell (9 September 1916 – 25 May 1977) was an Argentine tennis player who competed in the 1930s, 1940s and 1950s.

Russell had "a strong and well-proportioned physique and invariably hit all the balls that came to him from his opponent with unusual violence."

[2] He reached the quarterfinals of the U.S. National Championships in 1942 and 1945[3] and was a finalist in the mixed doubles in 1942 (partnering Patricia Todd).

One of his early tournament victories in South America in 1939 was over a young Pancho Segura.

[2] He died of a heart attack whilst playing a tennis match in Bayonne, France, in 1977, aged 60.