The Ostrava ATP tournament (officially Czech Indoor ) was a tennis tournament in Ostrava and part of the ATP Tour from 1994 to 1998 . It was played in the ČEZ Aréna in Ostrava, the playing surface was carpet. In the five years, apart from David Prinosil, no player has managed to win the tournament more than once. Prinosil won singles in 1996 and doubles in 1998 alongside Nicolas Kiefer .