Jiří Granát (born 28 January 1955) is a former professional tennis player from the Czech Republic who competed for Czechoslovakia.

[1] Granát took part in the main singles draw of nine Grand Slam tournaments during his career.

[2] He made the third round of the 1979 French Open, beating Jose Luis Damiani and then Francisco González.

[2] On the Grand Prix tennis circuit, Granát won one title, which was the doubles at the 1981 Sofia Open.

[3] He defected to Switzerland in 1983 and worked for the Swiss Tennis Federation as a coach after retiring.