2005 Zentiva Czech Indoor Open – Men's singles

The 2005 Zentiva Czech Indoor Open Open was a men's tennis tournament played on indoor hard courts in Průhonice, Czech Republic, and was part of the 2005 ATP Challenger Series.

This was the third edition of the event and was held from 22 to 27 November 2005.

Tuomas Ketola chose not to defend the title.

Raemon Sluiter won in the final 6–3, 7–5, against Nicolas Thomann.

Seeds
• #🇮🇹 Daniele Bracciali (first round)

• #🇳🇱 Raemon Sluiter (champion)

• #🇫🇷 Grégory Carraz (quarterfinals)

• #🇸🇰 Michal Mertiňák (quarterfinals)

• #🇨🇦 Frédéric Niemeyer (first round)

• #🇺🇦 Sergiy Stakhovsky (semifinals)

• #🇰🇿 Evgeny Korolev (quarterfinals)

• #🇨🇿 Tomáš Cakl (first round)