2025 HPP Open – Singles
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Kei Nishikori was the defending champion but chose not to defend his title.
Patrick Kypson won the title after defeating Otto Virtanen 4–6, 6–3, 6–4 in the final.
Seeds
- Croatia Marin Čilić (quarterfinals)
- Italy Luca Nardi (quarterfinals)
- United States Brandon Holt (first round)
- Serbia Dušan Lajović (first round)
- United States Patrick Kypson (champion)
- Finland Otto Virtanen (final)
- Italy Giulio Zeppieri (quarterfinals)
- Croatia Luka Mikrut (first round)
Draw
Key
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- ITF = ITF entry
- PR = Protected ranking
- SR = Special ranking
- SE = Special exempt
- JE = Junior exempt
- JR = Junior Accelerator Programme entrant
- CO = College Accelerator Programme entrant
- NG = Next Gen Accelerator Program entrant
- w/o = Walkover
- r = Retired
- d = Defaulted
Finals
| Semifinals | Final | ||||||||||||
| 6 | Finland Otto Virtanen | 6 | 6 | ||||||||||
| Q | France Sascha Gueymard Wayenburg | 2 | 4 | ||||||||||
| 6 | Finland Otto Virtanen | 6 | 3 | 4 | |||||||||
| 5 | United States Patrick Kypson | 4 | 6 | 6 | |||||||||
| 5 | United States Patrick Kypson | 77 | 3 | 6 | |||||||||
| Italy Stefano Travaglia | 65 | 6 | 2 |
Top half
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | Croatia M Čilić | 6 | 7 | ||||||||||||||||||||||||
| Lebanon B Hassan | 4 | 5 | 1 | Croatia M Čilić | 6 | 4 | 7 | ||||||||||||||||||||
| PR | Italy S Napolitano | 6 | 63 | 6 | PR | Italy S Napolitano | 2 | 6 | 5 | ||||||||||||||||||
| Canada A Galarneau | 2 | 77 | 4 | 1 | Croatia M Čilić | 5 | 4 | ||||||||||||||||||||
| WC | Finland E Ruusuvuori | 6 | 77 | 6 | Finland O Virtanen | 7 | 6 | ||||||||||||||||||||
| Austria L Neumayer | 4 | 63 | WC | Finland E Ruusuvuori | 4 | 2 | |||||||||||||||||||||
| Belgium G Onclin | 1 | 66 | 6 | Finland O Virtanen | 6 | 6 | |||||||||||||||||||||
| 6 | Finland O Virtanen | 6 | 78 | 6 | Finland O Virtanen | 6 | 6 | ||||||||||||||||||||
| 4 | Serbia D Lajović | 3 | 63 | Q | France S Gueymard Wayenburg | 2 | 4 | ||||||||||||||||||||
| Q | Croatia M Dodig | 6 | 77 | Q | Croatia M Dodig | 4 | 2 | ||||||||||||||||||||
| Q | France S Gueymard Wayenburg | 3 | 77 | 6 | Q | France S Gueymard Wayenburg | 6 | 6 | |||||||||||||||||||
| Croatia B Gojo | 6 | 62 | 4 | Q | France S Gueymard Wayenburg | 6 | 7 | ||||||||||||||||||||
| Luxembourg C Rodesch | 6 | 63 | 6 | 7 | Italy G Zeppieri | 3 | 5 | ||||||||||||||||||||
| Germany J Engel | 4 | 77 | 4 | Luxembourg C Rodesch | 6 | 2 | 3 | ||||||||||||||||||||
| WC | Finland O Paldanius | 62 | 2 | 7 | Italy G Zeppieri | 4 | 6 | 6 | |||||||||||||||||||
| 7 | Italy G Zeppieri | 77 | 6 |
Bottom half
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | United States P Kypson | 5 | 6 | 6 | |||||||||||||||||||||||
| Q | France G Blancaneaux | 7 | 1 | 3 | 5 | United States P Kypson | 3 | 6 | 77 | ||||||||||||||||||
| Bosnia and Herzegovina N Fatić | 3 | 64 | France C Hemery | 6 | 2 | 65 | |||||||||||||||||||||
| France C Hemery | 6 | 77 | 5 | United States P Kypson | 6 | 6 | |||||||||||||||||||||
| SE | Italy L Giustino | 6 | 6 | SE | Italy L Giustino | 4 | 2 | ||||||||||||||||||||
| SE | France T Droguet | 2 | 4 | SE | Italy L Giustino | 77 | 77 | ||||||||||||||||||||
| Belgium K Coppejans | 6 | 3 | 7 | Belgium K Coppejans | 65 | 65 | |||||||||||||||||||||
| 3 | United States B Holt | 4 | 6 | 5 | 5 | United States P Kypson | 77 | 3 | 6 | ||||||||||||||||||
| 8 | Croatia L Mikrut | 5 | 1 | Italy S Travaglia | 65 | 6 | 2 | ||||||||||||||||||||
| WC | Finland E Vasa | 7 | 6 | WC | Finland E Vasa | 4 | 7 | 5 | |||||||||||||||||||
| Italy S Travaglia | 6 | 6 | Italy S Travaglia | 6 | 5 | 7 | |||||||||||||||||||||
| Q | United Kingdom S Parker | 3 | 4 | Italy S Travaglia | 6 | 1 | 6 | ||||||||||||||||||||
| Q | Norway V Durasovic | 78 | 6 | 2 | Italy L Nardi | 2 | 6 | 1 | |||||||||||||||||||
| Italy F Cinà | 66 | 4 | Q | Norway V Durasovic | 2 | 2 | |||||||||||||||||||||
| Q | Lithuania E Butvilas | 4 | 2 | 2 | Italy L Nardi | 6 | 6 | ||||||||||||||||||||
| 2 | Italy L Nardi | 6 | 6 |