# 2019 Prosperita Open – Singles

Arthur De Greef was the defending champion but lost in the third round to Tomáš Macháč.
Kamil Majchrzak won the title after defeating Jannik Sinner 6–1, 6–0 in the final.

## Seeds

All seeds receive a bye into the second round.
* Lloyd Harris (semifinals)
* Jiří Veselý (quarterfinals)
* Marcel Granollers (second round)
* Kamil Majchrzak (champion)
* Dennis Novak (quarterfinals)
* Stefano Travaglia (quarterfinals)
* Jürgen Zopp (second round)
* Arthur De Greef (third round)
* Dominik Köpfer (second round)
* Stefano Napolitano (second round)
* Tallon Griekspoor (second round)
* Viktor Galović (third round)
* Adam Pavlásek (second round)
* Norbert Gombos (third round)
* Thiemo de Bakker (second round)
* Matteo Viola (second round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Lloyd Harris | 6 | 7 | | | | | | | | | |
| 6 | Stefano Travaglia | 1 | 5 | | | | | | | | | |
| 6 | Stefano Travaglia | 1 | 5 | 1 | Lloyd Harris | 6$^5$ | 6$^9$ | | | | | |
| | | | | 4 | Kamil Majchrzak | 7$^7$ | 7$^{11}$ | | | | | |
| 4 | Kamil Majchrzak | 6 | 6 | 4 | Kamil Majchrzak | 7$^7$ | 7$^{11}$ | | | | | |
| 5 | Dennis Novak | 4 | 0 | | | | | | | | | |
| 5 | Dennis Novak | 4 | 0 | | | | | | 4 | Kamil Majchrzak | 6 | 6 |
| | | | | | | | | | | Jannik Sinner | 1 | 0 |
| WC | Tomáš Macháč | 4 | 1 | | | | | | | | | | Jannik Sinner | 1 | 0 |
| | Steven Diez | 6 | 6 | | | | | | | | | |
| | Steven Diez | 6 | 6 | | Steven Diez | 4 | 6 | 2 | | | | |
| | | | | | Jannik Sinner | 6 | 4 | 6 | | | | |
| | Jannik Sinner | 6 | 7$^7$ | | Jannik Sinner | 6 | 4 | 6 | | | | |
| 2 | Jiří Veselý | 4 | 6$^4$ | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | L Harris | 6 | 6 | | | | | | | | | |
| | D Dima | 6 | 3 | 7$^7$ | | D Dima | 3 | 0 | | | | | | | | | |
| | M Valkusz | 1 | 6 | 6$^4$ | | | | | | 1 | L Harris | 6 | 6 | | | | |
| ITF | V Kopřiva | 6 | 1 | 4 | | | | | | | J Šátral | 4 | 1 | | | | |
| | J Šátral | 3 | 6 | 6 | | J Šátral | 6$^3$ | 7$^7$ | 6 | | | | | | | | |
| | | | | | 15 | T de Bakker | 7$^7$ | 6$^5$ | 4 | | | | | | | | |
| | | | | | | | | | | | | | | 1 | L Harris | 6 | 7 |
| | | | | | | | | | | | | | | 6 | S Travaglia | 1 | 5 |
| | | | | | 12 | V Galović | 6 | 6 | | | | | | | | | |
| WC | David Poljak | 4 | 7$^7$ | 6 | WC | D Poljak | 2 | 1 | | | | | | | | | |
| Alt | A Vavassori | 6 | 6$^4$ | 4 | | | | | | 12 | V Galović | 4 | 4 | | | | |
| Q | E Dalla Valle | 2 | 4 | | | | | | | 6 | S Travaglia | 6 | 6 | | | | |
| | R Ojeda Lara | 6 | 6 | | | R Ojeda Lara | 4 | 6 | 2 | | | | | | | | |
| | | | | | 6 | S Travaglia | 6 | 1 | 6 | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 4 | K Majchrzak | 7 | 7 | | | | | | | | | |
| ITF | R Bonadio | 6 | 4 | 6 | ITF | R Bonadio | 5 | 5 | | | | | | | | | |
| | T Brkić | 2 | 6 | 3 | | | | | | 4 | K Majchrzak | 7$^7$ | 6 | | | | |
| | Z Piros | 6 | 6 | | | | | | | | Z Piros | 6$^3$ | 3 | | | | |
| | V Šafránek | 2 | 2 | | | Z Piros | 6 | 0 | 6 | | | | | | | | |
| | | | | | 13 | A Pavlásek | 3 | 6 | 3 | | | | | | | | |
| | | | | | | | | | | | | | | 4 | K Majchrzak | 6 | 6 |
| | | | | | | | | | | | | | | 5 | D Novak | 4 | 0 |
| | | | | | 11 | T Griekspoor | 6 | 3 | 2 | | | | | | | | |
| | A Basso | 6 | 6 | | | A Basso | 3 | 6 | 6 | | | | | | | | |
| WC | M Gengel | 2 | 2 | | | | | | | | A Basso | 5 | 4 | | | | |
| | D Kuzmanov | 6 | 3 | | | | | | | 5 | D Novak | 7 | 6 | | | | |
| PR | P Riba | 2 | 1$^r$ | | | D Kuzmanov | 6 | 4 | 4 | | | | | | | | |
| | | | | | 5 | D Novak | 2 | 6 | 6 | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 8 | A De Greef | 6 | 3 | 6 | | | | | | | | | |
| | P Kotov | 2 | 3 | | B Bonzi | 2 | 6 | 3 | | | | | | | | | |
| | B Bonzi | 6 | 6 | | | | | | 8 | A De Greef | 6 | 6$^6$ | 6$^4$ | | | | |
| Q | J Forejtek | 3 | 3 | | | | | | WC | T Macháč | 1 | 7$^8$ | 7$^7$ | | | | |
| WC | T Macháč | 6 | 6 | WC | T Macháč | 6 | 7$^7$ | | | | | | | | | | |
| | | | | 10 | S Napolitano | 1 | 6$^4$ | | | | | | | | | | |
| | | | | | | | | | | | | | | WC | T Macháč | 4 | 1 |
| | | | | | | | | | | | | | | | S Diez | 6 | 6 |
| | | | | 14 | N Gombos | 6 | 7 | | | | | | | | | | |
| | E Ruusuvuori | 6$^4$ | 4 | ITF | P Heller | 4 | 5 | | | | | | | | | | |
| ITF | Peter Heller | 7$^7$ | 6 | | | | | | 14 | N Gombos | 7$^7$ | 3 | 6$^4$ | | | | |
| | S Diez | 6 | 6 | | | | | | | S Diez | 6$^1$ | 6 | 7$^7$ | | | | |
| | E Couacaud | 1 | 1 | | S Diez | 4 | 6 | 6 | | | | | | | | | |
| | | | | 3 | M Granollers | 6 | 4 | 4 | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 7 | J Zopp | 5 | 7$^7$ | 4 | | | | | | | | |
| WC | J Lehečka | 7 | 4 | 6 | WC | J Lehečka | 7 | 6$^4$ | 6 | | | | | | | | |
| WC | D Svrčina | 5 | 6 | 1 | | | | | | WC | J Lehečka | 4 | 2 | | | | |
| | J Sinner | 6 | 7$^8$ | | | | | | | | J Sinner | 6 | 6 | | | | |
| | A Balázs | 4 | 6$^6$ | | | J Sinner | 6 | 6 | | | | | | | | | |
| | | | | | 9 | D Köpfer | 2 | 3 | | | | | | | | | |
| | | | | | | | | | | | | | | | J Sinner | 6 | 7$^7$ |
| | | | | | | | | | | | | | | 2 | J Veselý | 4 | 6$^4$ |
| | | | | | 16 | M Viola | 4 | 4 | | | | | | | | | |
| ITF | I Gakhov | 3 | 6 | 6 | ITF | I Gakhov | 6 | 6 | | | | | | | | | |
| ITF | A Zhurbin | 6 | 1 | 4 | | | | | | ITF | I Gakhov | 6$^6$ | 3 | | | | |
| | J Sels | 7 | 5 | 6 | | | | | | 2 | J Veselý | 7$^8$ | 6 | | | | |
| | A Molčan | 5 | 7 | 4 | | J Sels | 1 | 1 | | | | | | | | | |
| | | | | | 2 | J Veselý | 6 | 6 | | | | | | | | | |