| Competition: | Primeira Liga |
| Season: | 2017–18 |
| Dates: | 6 August 2017 – 13 May 2018 |
| Winners: | Porto 28th title |
| Relegated: | Paços de Ferreira Estoril |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | Porto Benfica |
| Continentalcup2: | Europa League |
| Continentalcup2 Qualifiers: | Sporting CP Braga Rio Ave |
| League Topscorer: | Jonas (34 goals) |
| Biggest Home Win: | (1 October 2017) |
| Biggest Away Win: | (3 March 2018) |
| Highest Scoring: | (22 September 2017) (15 April 2018) |
| Matches: | 306 |
| Total Goals: | 826 |
| Longest Wins: | 9 matches Benfica |
| Longest Unbeaten: | 23 matches Porto |
| Longest Winless: | 11 matches Estoril |
| Longest Losses: | 8 matches Estoril |
| Highest Attendance: | 63,526[1] (15 April 2018) |
| Lowest Attendance: | 942 (4 December 2017) |
| Attendance: | 3,655,213[2] |
| Average Attendance: | 11,945 |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The 2017–18 Primeira Liga (also known as Liga NOS for sponsorship reasons) was the 84th season of the Primeira Liga, the top professional league for Portuguese association football clubs. Benfica were the defending champions for a fourth consecutive time, but they did not retain the title. Porto became the new champions with two matches to spare, clinching their 28th league title. This was their first trophy in four years.
Since Portugal dropped from fifth to seventh place in the UEFA association coefficient rankings at the end of 2016–17 season, only the two best-ranked teams could qualify for the UEFA Champions League (the champions entered directly into the group stage, and the runners-up entered the third qualifying round). The third and fourth-placed teams qualified respectively to the UEFA Europa League third and second qualifying rounds.[3] [4]
Eighteen teams competed in the league – the top sixteen teams from the 2016–17 season, as well as two teams promoted from the LigaPro.
Portimonense became the first club to be promoted on 23 April 2017 and will play in Primeira Liga for the first time since the 2010–11 season.[5] On 21 May 2017, after a 2–1 win in Azores against Santa Clara, they were crowned champions.[6] The other team promoted were runners-up Desportivo das Aves, following a 2–2 draw against União da Madeira on 30 April 2017.[7] This will mark the return of the Vila das Aves' team to the top flight after a 10-season absence.
The two promoted clubs replaced Nacional and Arouca. Nacional confirmed their relegation on 5 May 2017, 15 years after their promotion, when Moreirense, who were also struggling to escape relegation, beat Braga.[8] On the last matchday, Arouca's 4–2 defeat against Estoril sealed their relegation, four seasons after having been promoted for the first time to Primeira Liga.[9]
| Team | Manager | Captain | Kit Manufacturer | Sponsors | |
|---|---|---|---|---|---|
| Belenenses | Silas | Gonçalo Silva | Lacatoni | Kia Motors | |
| Benfica | Rui Vitória |  Luisão | Adidas | Emirates | |
| Boavista | Jorge Simão |  Idris | BLK | Mestre da Cor | |
| Braga | Abel Ferreira |  Nikola Vukčević | Lacatoni | Visit Braga | |
| Chaves | Luís Castro | Nuno André Coelho | Lacatoni | Museu do Pão | |
| Desportivo das Aves | José Mota | Nélson Lenho | Macron | MEO | |
| Estoril | Ivo Vieira | Diogo Amado | Nike | EuroBic | |
| Feirense | Nuno Manta | Cris | Legea | Castro Electrónica | |
| Marítimo | Daniel Ramos | Edgar Costa | Nike | Santander Totta | |
| Moreirense | Petit | André Micael | CDT | — | |
| Paços de Ferreira | João Henriques |  Ricardo | Lacatoni | Aldro | |
| Portimonense | Vítor Oliveira | Ricardo Pessoa | Mizuno | McDonald's Portimão | |
| Porto | Sérgio Conceição |  Iván Marcano | New Balance | Altice | |
| Rio Ave | Miguel Cardoso | Tarantini | Adidas | MEO | |
| Sporting CP | Jorge Jesus | William Carvalho | Macron | NOS | |
| Tondela | Pepa | Ricardo Costa | CDT | Laboratórios BASI | |
| Vitória de Guimarães | José Peseiro | Josué Sá | Macron | — | |
| Vitória de Setúbal | José Couceiro | Vasco Fernandes[10] | Hummel | Kia Motors |
| Team | Outgoing manager | Manner of departure | Date of vacancy | Position in table | Incoming manager | Date of appointment | |
|---|---|---|---|---|---|---|---|
| Porto | Nuno Espírito Santo | Resigned | 22 May 2017[11] | Pre-season | Sérgio Conceição | 8 June 2017[12] | |
| Desportivo das Aves | José Mota | Resigned | 23 May 2017[13] | Ricardo Soares | 27 May 2017 | ||
| Rio Ave | Luís Castro | Mutual consent | 24 May 2017[14] | Miguel Cardoso | 12 June 2017[15] | ||
| Moreirense | Petit | Mutual consent | 26 May 2017[16] | Manuel Machado | 27 May 2017[17] | ||
| Chaves | Ricardo Soares | Resigned | 27 May 2017[18] | Luís Castro | 1 June 2017[19] | ||
| Boavista | Miguel Leal | Resigned | 13 September 2017[20] | 16th | Jorge Simão | 14 September 2017[21] | |
| Desportivo das Aves | Ricardo Soares | Sacked | 2 October 2017[22] | 16th | Lito Vidigal | 2 October 2017[23] | |
| Estoril | Pedro Emanuel | Mutual consent | 21 October 2017[24] | 18th | Filipe Pedro | 21 October 2017[25] | |
| Paços de Ferreira | Vasco Seabra | Mutual consent | 23 October 2017[26] | 13th | Petit | 23 October 2017[27] | |
| Moreirense | Manuel Machado | Sacked | 29 October 2017[28] | 17th | Sérgio Vieira | 31 October 2017[29] | |
| Estoril | Filipe Pedro | End of caretaker role | 13 November 2017 | 18th | Ivo Vieira | 13 November 2017[30] | |
| Paços de Ferreira | Petit | Mutual consent | 8 January 2018[31] | 14th | João Henriques | 12 January 2018[32] | |
| Belenenses | Domingos Paciência | Mutual consent | 15 January 2018[33] | 11th | Silas | 15 January 2018 | |
| Moreirense | Sérgio Vieira | Mutual consent | 13 February 2018[34] | 17th | Petit | 14 February 2018[35] | |
| Vitória de Guimarães | Pedro Martins | Sacked | 18 February 2018[36] | 9th | José Peseiro | 28 February 2018[37] |
See main article: List of Primeira Liga hat-tricks.
| Player | For | Against | Result | Date | |
|---|---|---|---|---|---|
| 5–0[39] | |||||
 | 3–0[40] | ||||
| 5–1[41] | |||||
| | 5–0[42] | ||||
| 5–0[43] | |||||
| 3–0[44] | |||||
| 4–1[45] | |||||
| 5–0[46] | |||||
| Edinho4 | 4–1[47] | ||||
| 4–3[48] |
| Rank | Player | Club | Clean sheets |
|---|---|---|---|
| 1 | Rui Patrício | Sporting CP | 17 |
| 2 | Matheus | Braga | 14 |
| 3 | Bruno Varela | Benfica | 13 |
| 4 | Iker Casillas | Porto | 12 |
| 5 | Vagner | Boavista | 11 |
| 6 | Charles | Marítimo | 10 |
| 7 | Cássio | Rio Ave | 9 |
| Caio Secco | Feirense | ||
| 9 | Cláudio Ramos | Tondela | 8 |
| 10 | José Sá | Porto | 7 |
| Adriano Facchini | Feirense |
Gevorg Ghazaryan, for Marítimo vs Sporting CP (13 May 2018)| Month | Player of the Month | Goal of the Month | |||||
|---|---|---|---|---|---|---|---|
| Name | Club | Name | Club | Against | Date | ||
| August[54] | Bruno Fernandes | Sporting CP | Bruno Fernandes | Sporting CP | Vitória de Guimarães | 19 August 2017 | |
| September[55] | Bruno Fernandes | Sporting CP | Bruno Fernandes | Sporting CP | Tondela | 16 September 2017 | |
| October/November[56] | Jonas | Benfica | Rodrigo Pinho | Marítimo | Tondela | 28 October 2017 | |
| December[57] | Jonas | Benfica | Dráusio | Marítimo | Moreirense | 2 December 2017 | |
| January[58] | Jonas | Benfica | Yacine Brahimi | Porto | Vitória de Guimarães | 7 January 2018 | |
| February[59] | Jonas | Benfica |  Franco Cervi | Benfica | Portimonense | 10 February 2018 | |
| March[60] | Jonas | Benfica | André Pereira | Vitória de Setúbal | Portimonense | 6 March 2018 | |
| April[61] | Bruno Fernandes | Sporting CP |  Héctor Herrera | Porto | Benfica | 15 April 2018 | |
| Month | Player | Club | Vote percentage | |
|---|---|---|---|---|
| August[62] | 22.51% | |||
| September[63] | 18.78% | |||
| October/November[64] | 14.94% | |||
| December[65] | 14.00% | |||
| January[66] | 19.01% | |||
| February[67] | 17.30% | |||
| March[68] | 24.09% | |||
| April[69] | 16.87% |
| Month | Scorer | For | Against | Stadium | Date | Vote percentage |
|---|---|---|---|---|---|---|
| August[70] | Bruno Fernandes | Sporting CP | Vitória de Guimarães | Estádio D. Afonso Henriques | 19 August 2017 | 32.05% |
| September[71] | André Sousa | Belenenses | Feirense | Estádio Marcolino de Castro | 24 September 2017 | 41.67% |
| October[72] | Rodrigo Pinho | Marítimo | Tondela | Estádio do Marítimo | 28 October 2017 | 54.70% |
| November[73] |  Shoya Nakajima | Portimonense | Tondela | Estádio Municipal de Portimão | 25 November 2017 | 40.74% |
| December[74] | Dráusio | Marítimo | Moreirense | Parque Joaquim de Almeida Freitas | 2 December 2017 | 37.78% |
| January[75] | Fabrício | Portimonense | Rio Ave | Estádio Municipal de Portimão | 29 January 2018 | 33.33% |
| February[76] | Shoya Nakajima | Portimonense | Feirense | Estádio Marcolino de Castro | 16 February 2018 | 47.06% |
| March[77] | Nildo Petrolina | Desportivo das Aves | Portimonense | Estádio do CD Aves | 5 March 2018 | 44.44% |
| April[78] | Héctor Herrera | Porto | Benfica | Estádio da Luz | 15 April 2018 | 37.04% |
| May[79] | Kuca | Boavista | Belenenses | Estádio do Bessa | 12 May 2018 | 44.44% |
The Player of the Season was awarded to Bruno Fernandes (Sporting CP).[80]
The Manager of the Season was awarded to Sérgio Conceição (Porto).
The Goal of the Season was awarded to Rodrigo Pinho (Marítimo), against Tondela on 28 October 2017.
| Team of the Season |
The Team of the Season was:[81]
Alex Telles (Porto), Felipe (Porto), Sebastián Coates (Sporting CP), Ricardo Pereira (Porto) Héctor Herrera (Porto), Pizzi (Benfica) Jonas (Benfica), 
Moussa Marega (Porto), Gelson Martins (Sporting CP)The Young Player of the Year was awarded to Rúben Dias (Benfica).
The Club Fair-Play Prize was awarded to Chaves.
The Player Fair-Play Prize was awarded to Casillas (Porto).
The goal of the season was disputed by all the previous winners of the monthly polls.[82]
| Rank | Scorer | Vote percentage | |
|---|---|---|---|
| 1st | Héctor Herrera | 43.70% | |
| 2nd | André Sousa | 12.20% | |
| 3rd | Bruno Fernandes | 10.23% |
