[1] He represented his country at the 1996 Summer Olympics in Atlanta, where he was defeated in the first round by Daniel Vacek of the Czech Republic.

In the doubles competition in Stone Mountain Park he won the bronze medal partnering Marc-Kevin Goellner.

He was the first opponent of Tim Henman in the main draw of a Grand Slam tournament, in the first round of Wimbledon in 1994.

[1] Prinosil achieved an upset victory over Greg Rusedski in the second round of the Ericsson Open Masters tournament in 2001 with strong returns.

Prinosil and Rusedski had gone through rehabilitation together after foot surgeries in the same hospital in 1999.