Toomas Leius (28 August 1941 – 7 February 2025) was an Estonian tennis player who competed for the Soviet Union.

Other good performances during his career include reaching the final of the 1964 Queen's Club Championships, which he lost to Roy Emerson, and taking Rod Laver to five sets at the 1969 Heineken Open.

[3] He was due to face South African player Cliff Drysdale in the quarter-final but the Soviet delegation made him forfeit the match, in protest against apartheid.

He was a regular fixture in the Soviet Davis Cup team during the 1960s and appeared in a total of 20 ties, from which he managed 23 wins, 17 of them in singles.

[5][6] Leius worked as a tennis coach after leaving prison and spent some time as captain of the Estonia Fed Cup team.