Porto's disappointing Primeira Liga season will at least see them claim a UEFA Champions League spot after they beat Rio Ave 3-0 on Monday.
Benfica clinched the title on Sunday as they beat Olhanense 2-0 and with Sporting Lisbon on 66 points, all Porto could do was get a win to secure a third-placed finish ahead of Estoril, who are now a further eight points adrift.
Luis Castro – who has been in charge since March – named a strong line-up at Estadio do Dragao, but he was forced into an early change as Silvestre Varela limped off with an injury.
After a lacklustre first half in which there was an aura of carelessness following Benfica's title triumph, Porto finally took the lead just after the hour mark as Jackson Martinez won and converted a penalty.
The second arrived 11 minutes later as Hector Herrera produced a fine header to direct Juan Fernando Quintero's precise pass past the helpless Ederson Moraes.
Highly-rated right-back Danilo added a third for good measure in stoppage time, firing in a deflected effort from outside the area after Quintero played a short free-kick.
Monday's only other match saw Vitoria Setubal held to a 1-1 draw at home by Sporting Braga in a mid-table clash which had little impact on the top or bottom of the table.
The visitors got off to a good start as they targeted a win to move them up to sixth, with Eder opening the scoring for them after just 12 minutes.
Eduardo put their position in significant doubt 14 minutes later, though.
The Portugal international goalkeeper received a straight red card and although the numerically-disadvantaged Braga managed to hold on to their lead for a significant amount of time, Setubal eventually drew level through Pedro Tiba in the 80th minute.
Braga's failure to win means they can no longer finish in the top five, thus confirming their absence from the UEFA Europa League.
|Coach: Luís Castro|
for Silvestre Varela 38'
for Josue 46'
for Alex Sandro 77'
|Matthews completes Sunderland move|
|Podolski set for Galatasaray medical|
|Gundogan inspires Dortmund victory|
|Inter confirm Montoya capture|
|Murillo joins Inter, as Kuzmanovic and Obi depart|
|Falcao signing not a risk, says former Chelsea star|
|Deeney agrees new Watford deal|
|Confidence and service the key to Falcao success at Chelsea|
|No bids for ´Chelsea target´ Baba, claim Augsburg|
|Derby swoop for Ince|
|Fiorentina consider legal action over Salah ´no-show´|
|Chelsea the team to beat in the Premier League, says Neville|
|Storari exits Juve for Cagliari|
|UEFA removes FFP restrictions on Man City and PSG|
|West Brom hope for new owners within the month|
|Chelsea agree loan deal for Falcao|
|Kuyt eyes trophies on Feyenoord return|
|Chile v Argentina: History beckons ahead of Copa America final|
|Wallace extends Monaco loan|
|Mihajlovic wants to instill fear factor at Milan|
|Mignolet improving at Liverpool - Grobbelaar|
|Mumbai City name Anelka player-manager|
|Olivia the parrot predicts Japan to win Women´s World Cup|
|Lusitans coach blasts Bilic´s ´lack of respect´|
|Sakho eyes more Europa League wins|
|Gareca wants Peru to keep building|
|Chile ´no chance´ if Argentina produce their best - Diaz|
|Ocampos joins Marseille permanently|
|Europa League Review: Cloud-nine Brondby ignite opening round|
|West Ham 3 Lusitans 0: Sakho nets twice at start of Europa League journey|
|Holebas makes Watford move|
|Milan secure Adriano signing|
|Peru v Paraguay: Diaz counts cost of semi-final loss|
|Bastia hit out at reports of extra debt|
|Hernandez has successful surgery|
|Odemwingie signs one-year Stoke extension|
|Uth signs for Hoffenheim|
|Henen seals Everton return|
|Cattermole pens long-term Sunderland deal|
|United States v Guatemala: Klinsmann backs Dempsey ahead of Gold Cup warm-up|
|West Ham working on Jenkinson return - Gold|
|Milan agree deal for Bacca|
|Real buy back Vazquez from Espanyol|
|Richards leaves Swansea for Fulham|
|McShane signs for Reading|
|Giggs tells youngsters to seize US chance|
|Hammond pens Leicester extension|
|Only Schweinsteiger can decide Bayern future - Guardiola|
|Cech plans to play until he´s 40|
|Montoya arrives in Milan ahead of Inter move|
|Hernandez out of Gold Cup|
|US asks Switzerland to extradite seven FIFA officials|
|MLS Preview: Sounders seek momentum switch|
|Mexico 0 Honduras 0: Hernandez injury sours friendly|
|Hernandez taken to hospital|
|Garay in doubt for Copa America final|
|Wambach: USA peaking for World Cup final|
|Bassett ´an absolute hero´ despite own goal - Sampson|
|Japan 2 England 1: Late own goal breaks English hearts|
|Salvo quits as Valencia president|
|Costa not Ribery cover - Bayern director Sammer|