Tihomir Ruslanov Grozdanov (, 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.
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 4âÂÂ2 and doubles W/L record is 9âÂÂ1 (13âÂÂ3 overall).