Tihomir Ruslanov Grozdanov (Bulgarian: Тихомир Русланов Грозданов, born 29 April 1987) is a former professional Bulgarian tennis player.

On 30 December 2013, he reached his highest ATP singles ranking of 394 whilst his best doubles ranking was 545 on 17 January 2011.

[1][2][3][4][5] Tihomir Grozdanov debuted for the Bulgaria Davis Cup team in 2008.

Since then he has 11 nominations with 13 ties played, his singles W/L record is 4–2 and doubles W/L record is 9–1 (13–3 overall).