The 2018 Poprad-Tatry ATP Challenger Tour was a professional tennis tournament played on clay courts. It was the fourth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Poprad, Slovakia between 18 and 23 June 2018.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Austria | Gerald Melzer | 109 | 1 | |
 Norway | Casper Ruud | 137 | 2 | |
 Czech Republic | Adam Pavlásek | 147 | 3 | |
 Slovakia | Jozef Kovalík | 149 | 4 | |
 Egypt | Mohamed Safwat | 166 | 5 | |
 Hungary | Attila Balázs | 202 | 6 | |
| Austria | Dennis Novak | 209 | 7 | |
 Belarus | Uladzimir Ignatik | 213 | 8 |
The following players received wildcards into the singles main draw:
Andrej Glváč Lukáš Klein Dominik Šproch Peter VajdaThe following players received entry from the qualifying draw:
Frank Dancevic Andreas Haider-Maurer Pavel Nejedlý Jan ŠátralSee main article: 2018 Poprad-Tatry ATP Challenger Tour – Singles.
Jozef Kovalík def. 
Arthur De Greef 6–4, 6–0.See main article: 2018 Poprad-Tatry ATP Challenger Tour – Doubles.
Tomislav Brkić / Ante Pavić def. 
Nikola Čačić / Luca Margaroli 6–3, 4–6, [16–14].