Pisnik started playing tennis at the age of seven.
From 1996 she played at ITF tournaments, where she won her first title in 1997. On the WTA Tour she won a single and two double titles in her career. Between 1998 and 2005 she played 33 games for Slovenia in the Fed Cup , of which she was able to make 20 victorious.
Tina Pisnik ended her professional career in 2005.