The 2020 Slovak Open was a professional tennis tournament played on indoor hard courts. It was the 21st edition of the tournament which was part of the 2020 ATP Challenger Tour. It took place in Bratislava, Slovakia between 9 and 15 November 2020.
Singles main-draw entrants
Seeds
1 Rankings are as of 2 November 2020.
Other entrants
The following players received wildcards into the singles main draw: Lukáš Klein Jiří Lehečka Alex Molčan
The following player received entry into the singles main draw using a protected ranking: Maximilian Marterer
The following players received entry into the singles main draw as special exempts: Andrea Arnaboldi Quentin Halys
The following player received entry into the singles main draw as an alternate: Matteo Viola
The following players received entry from the qualifying draw: Mathias Bourgue Julian Lenz Tomáš Macháč Brayden Schnur
Champions
Singles
Maximilian Marterer def. Tomáš Macháč 6–7(3–7), 6–2, 7–5.
Doubles
Harri Heliövaara / Emil Ruusuvuori def. Lukáš Klein / Alex Molčan 6–4, 6–3.
