Main Draw

Entries
Seed Name Seeding RankingRk Entry RankingER
1 Jan Choinski129126
2 Jaime Faria149153
3 Elmer Moller152138
4 Henrique Rocha153167
5 Daniel Merida172171
6 Lukas Neumayer189186
7 Lorenzo Giustino220229
8 Zdenek Kolar222223
Frederico Ferreira Silva243249
Geoffrey Blancaneaux248253
Daniel Michalski256264
Tiago Pereira260280
Ivan Gakhov263266
Filip Cristian Jianu289294
Nikolas Sanchez Izquierdo303300
Pol Martin Tiffon304301
Franco Agamenone308308
Miguel Damas329333
Kilian Feldbausch343336
(WC) Gastao Elias380
(SE) Gianluca Cadenasso395
Federico Bondioli400409 (NG)
Stefano Napolitano490160 (PR)
(WC) Pedro Araujo528
(WC) Francisco Rocha736
Adrian Andreev867299 (PR)
(Q)
(Q)
(Q)
(Q)
(Q)
(Q)
Alternates
Name Seeding RankingRk Entry RankingER
1Lilian Marmousez349342
2Gabriele Piraino371348
3Andrej Nedic338349
4Gastao Elias380351
5Inaki Montes-De La Torre351363
6Svyatoslav Gulin375367
7Carlos Sanchez Jover328368
8Alexey Vatutin383379
9Andrej Martin387388
10Raul Brancaccio388396
11Max Alcala Gurri417408
12Federico Bondioli400409
13Cezar Cretu403410
14Lorenzo Carboni415426
15Jonas Forejtek440443
16Enrico Dalla Valle471467
17Gabriele Pennaforti520502
18Pedro Araujo528521
19Alexander Ritschard530522
20Stefano Napolitano490525
Withdrawals
Name Seeding RankingRk Entry RankingER
George Loffhagen208200
Edas Butvilas261267
Kilian Feldbausch343336 (NG)
Yannick Hanfmann104117
Abdullah Shelbayh278274
(SE)

Qualifying

Entries
Seed Name Seeding RankingRk Entry RankingER
1 Carlos Sanchez Jover328368
2 Lilian Marmousez349342
3 Svyatoslav Gulin375367
4 (ALT) Alexey Vatutin383
5 Andrej Martin387388
6 Raul Brancaccio388396
7 Cezar Cretu403410
8 Jonas Forejtek440443
9 Tommaso Compagnucci526520
10 Stefan Palosi539541
11 Carlos Lopez Montagud546540
12 Louis Wessels607714
Sergi Perez Contri630630
Giuseppe La Vela656658
Alejo Sanchez Quilez670668
Andres Santamarta Roig694688
Alexander Donski731720
Leo Raquillet756744
(ALT) Tiago Torres779
(ALT) Tomas Curras Abasolo799
(WC) Tomas Serrano Luis875
(WC) Tiago Cacao971
(WC) Joao Graca1226
(WC) Guilherme Valdoleiros2183
Alternates
Name Seeding RankingRk Entry RankingER
1Niccolo Catini794765
2Iannis Miletich775775
3Tomas Curras Abasolo799795
4Tomas Serrano Luis875870
5Filip Pieczonka900894
6David Pichler908902
7Ignacio Parisca Romera920911
8Alejandro Juan Mano963958
9Tiago Cacao9711015
10David Poljak9911046
11Sebastian Fanselow11081098
12Cleeve Harper11311117
13Hugo Maia14301413
14Filip Duda-1494
Withdrawals
Name Seeding RankingRk Entry RankingER
Franco Agamenone308308
Gastao Elias380351
Max Alcala Gurri417408
Adrian Andreev867299 (PR)
Pedro Araujo528521
Roberto Carballes Baena133133
Pol Martin Tiffon304301
Manuel Mazza518515
Enrico Dalla Valle471467
Miguel Damas329333
Francisco Rocha736753

Légende:

Original alternate but got in after withdrawals

For alternates: Are already accepted with Protected Ranking but might still get in with their actual ranking
(In ATP Q and Challengers): Was one of the entries but then dropped out after the withdrawal deadline, replaced by an ALT
An ALT that replaced a said late withdrawal (or that took a spot which was available because there were not enough alternates on the list to fill all vacancies before the withdrawal deadline)

In Challenger main draws, the original alternate list is still being used to determine ALTs after the withdrawal deadline, but only players who "preserved their eligibility" can still enter.
In ATP Doubles, this colour (if ALT is not written) refers to a re-pairing. When a player of an accepted team withdraws, his partner can enter again with a new partner until the withdrawal deadline as long as the combined ranking of the new team is better than the ranking of the first alternate team. Re-pairing is limited to 4 times per year per player.
Entered the main draw as Special Exempt (SE)
Entered as Wild Card (WC)
(In doubles): Were originally alternates and withdrew, so normally they would not appear in the withdrawal table. However, they got in after withdrawals and a player of the team either might still re-pair or has re-paired.
Is currently DA in either main draw or qualifying at another tournament in the same week, so he will have to withdraw somewhere once he gets into this tournament/if he is already in this tournament.
PR: Protected Ranking
LE: Late Entry Spot available in each 250 MD, goes to the highest-ranked player (using the original Entry Ranking) of those who would have been original DA if they had entered early and who entered after the Entry Deadline until the Thursday before the tournament starts
JA: Junior Accelerator, Challenger MD/Q spot for a year-end top 20 Junior player or Junior Grand Slam finalist
CA: College Accelerator, Challenger MD/Q spot for a top 20 ITA College player or NCAA Division I Tennis Championships quarterfinalist.
NG: ATP 250 spot for a Top 250 player younger than 20 in a week with 3 ATP tournaments, or CH100+ spot for a Top 350 player younger than 20.

About maia

The Oporto Open is a defunct ATP Tour affiliated men's tennis tournament played from 1995 to 1996. It was held in Maia in Portugal and was played on outdoor clay courts.

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