Iran face Bosnia-Herzegovina on Wednesday knowing they must win to have any chance of making the knockout stages of the FIFA World Cup.
Carlos Queiroz's side will need to put the disappointment of their late defeat to Argentina behind them and break from their shackles if they are to finish second in Group F, while hoping rivals Nigeria lose.
But first the focus must fall on ending their goalscoring drought, with Iran one of only two sides at the World Cup - Greece being the other - who have yet to score.
The display against Argentina will have given them a huge confidence boost, though, as Iran came within a few minutes of producing one of the most surprising results in World Cup history, until Lionel Messi's moment of brilliance.
Iran created chances of their own but Reza Ghoochannejhad and Ashkan Dejagah spurned the best of them, leaving Queiroz's men to contemplate what might have been.
Bosnia's debut at the global showpiece has not gone according to plan as their impressive form in qualifying, where they scored 30 goals, has failed to materialise in Brazil.
Defeats to Argentina and Nigeria have ended their hopes of qualification for the second round but Wednesday's match offers an opportunity to restore some pride and record a first World Cup win.
Talismanic striker Edin Dzeko has endured a frustrating tournament, missing a host of chances and being denied by an erroneous offside flag against Nigeria.
The Manchester City forward is not expected to start the final match as coach Safet Susic looks to give others a chance.
That will be music to the ears of Queiroz, who has been preparing his players for a crucial day in their World Cup history in Salvador.
"My major concern is to keep players focused," he said. "And, they'll need to convert those chances."
If Iran can finally find the back of the net to win, and Nigeria lose, they would both finish with four points and there could be a lengthy process to sort out second place in the group.
Initially goal difference would decide it, but there is a small chance that a lottery would have to decide who finishes second.
If Iran win their match 1-0 and Nigeria lose to Argentina by the same score, they would end up level on points and with the same number of goals for and against.
Given the teams drew 0-0 in their game, the only way to decide who progresses would be to draw lots - something that has never been used at a World Cup.
Iran should not take it for granted that they will win their final game, though, as Susic is determined to end Bosnia's maiden appearance at a finals on a high.
"Our obligation is to go out with honour, to leave a good impression,'' the coach said. ''It is a pity for this generation that it exits the World Cup so soon.
"They ran, fought and created chances."
|Coach: S. Sušić|
for A. Hadžić 61'
for T. Sušić 79'
for E. Džeko 84'
|Ballon d´Or is reserved for Messi - Neymar|
|Dortmund dismiss Aubameyang exit talk|
|Perisic ´decisive like Robben´ - Suker|
|Ferdinand: Fergie´s captaincy snub upset me|
|De Bruyne hungry for more goals|
|Dunga: Brazil are frustrated and lack reaction|
|Dani Alves: Time for Brazil to focus|
|I believed we would finish unbeaten - Hodgson|
|Del Bosque expects selection headache for Euro 2016|
|Ukraine 0 Spain 1: Hundred-cap Fabregas falters from the spot|
|Lithuania 0 England 3: Hodgson´s men make it a perfect 10|
|Fabregas reaches 100 Spain caps|
|Excited Conte targets top-four Euro 2016 showing|
|Spain pair Casillas and De Gea show the way for Rico|
|Liverpool not title candidates under Klopp - Barnes|
|Manchester United important to Northern Ireland success|
|Tevez cannot operate like Messi - Martino|
|Pele questions Brazil unity after qualifying loss|
|Ancelotti: Roma have the most quality in Serie A|
|Ghana v Canada: Hoilett desperate for international debut|
|Cruyff: Netherlands painful to watch|
|´No hatred´ between Bale and Ronaldo, claims Wales star´s agent|
|Mexico v Panama: Ferretti prepares for farewell|
|Wright signs new deal to end Dundee United speculation|
|Real Madrid are not making Bale demands, insists Coleman|
|Toure, Aubameyang and Salah lead CAF Player of the Year nominations|
|Neuer, De Gea the Messi and Ronaldo of goalkeeping - Ferguson|
|Sakho slams PSG over Coman treatment|
|Former FIFA Executive Committee member Makudi suspended|
|Mancini: It´s time for Inter to beat Juventus again|
|Blind talks down Depay, Van Persie row claims|
|Van Persie: Vieira inspired me to be strong mentally|
|Klopp will not ruin his reputation by raiding Dortmund - Rauball|
|Wolfsburg confirm Embolo interest|
|Sigurdsson looked up to Beckham, Lampard|
|Uruguay still a threat without Cavani and Suarez - Arias|
|PSG better than Bayern - Zidane|
|Allardyce: I deserved the England job in 2006|
|Baker: I will return to Chelsea a better player|
|I have no contact with Luis Enrique - Barca B captain Grimaldo|
|Carlo Ancelotti wants Premier League return|
|Klopp: I won´t poach Dortmund players|
|Xavi: I would have liked to play for Manchester United|
|Ronaldo´s success largely down to Benzema - Ancelotti|
|Willian ignoring his Brazil critics|
|Messi rivalry spurs on Ronaldo - Zidane|
|Klopp needs time and money - Hitzlsperger|
|United States v Costa Rica: Under-fire Klinsmann standing firm|
|Giroud satisfied with France contribution|
|Hodgson rejects easy cap claims|
|Honduras v South Africa: Mashaba´s men want consistency|
|Spain to play Belgium in November friendly|
|Lallana ´very excited´ by Klopp arrival|
|Santos: Serbia deserved to finish second|
|Iordanescu: Romania should´ve qualified earlier|
|De Biasi revels in Albania´s historic Euro 2016 berth|
|Reus misses sum up Germany´s problems - Low|
|Krul ´devastated´ after being ruled out for season|
|Lewandowski insists Poland fully deserve Euro 2016 spot|
|Deschamps urges France players to give him selection headaches|
|Hummels: Germany must seize attacking opportunities|
|Sabatini would re-sign former Roma trio|
|Low: Neuer´s saves were world class|
|Strachan unsure over Scotland future|
|Euro 2016 Qualifying Review: Germany survive scare, Albania reach first major tournament|
|O´Neill wants Northern Ireland to maintain momentum|
|Republic of Ireland let themselves down - Coleman|
|Lewandowski equals Healy´s Euro qualifying goal record|
|Nigeria 3 Cameroon 0: Super Eagles ease to victory|
|Gibraltar 0 Scotland 6: Fletcher hat-trick seals comfortable win|
|Germany 2 Georgia 1: Kruse and Neuer save world champions to seal qualification|
|Denmark 1 France 2: Giroud nets double in Benzema´s absence|
|Poland 2 Republic of Ireland 1: Lewandowski sends hosts to finals|
|Allardyce: It´s nice to be loved at Sunderland|
|Bonucci: Italy reborn under Conte|
|Ferguson calls for clubs to stand by managers|
|Wales v Andorra: Party time for Coleman´s history makers|
|Krul blow for Newcastle as keeper ruled out for season|
|Santos hails Moutinho impact|
|Italy v Norway: Top spot the prize for the hosts in Rome|
|Arlauskis hoping England clash boosts Watford chances|
|Ancelotti backs ´complete´ France for Euro 2016 glory|
|Serbia 1 Portugal 2: Santos extends winning run against nine-man opposition|
|Finland 1 Northern Ireland 1: Visitors secure top spot despite late leveller|
|Jagielka challenges England back-ups to impress|
|Shelvey and Vardy set for England roles - Hodgson|
|Mata revels in return to Ukraine|
|Jagielka to captain England against Lithuania|
|Del Bosque urges Spain to recapture Euro 2012 form in Ukraine|
|Uruguay v Colombia: Cardona ready for battle in Montevideo|
|Paraguay v Argentina: Tevez calls for change in attitude|
|Belgium v Israel: Visitors on the brink of exit as Hazard eyes Euro 2016 glory|
|Football League Review: Plymouth return to the top as Stevenage earn thrilling point|
|Don´t question my France attitude, Benzema tells critics|
|Klopp will not poach Dortmund players - Watzke|
|CAF World Cup Qualifying Review: Ethiopia complete comeback to progress|
|Allardyce calls on past experience in Sunderland survival bid|
|Peru v Chile: Medel not getting carried away|
|Brazil v Venezuela: Luiz Gustavo expecting a tough clash|
|Netherlands v Czech Republic: Wijnaldum out to seize last chance|
|Modric to miss crunch qualifier with Malta|
|Verratti: Pirlo still key to Italy midfield|
|Garcia relishing open Serie A title race|
|Marcelo downplays Neymar absence|
|Denmark 1-2 France: Giroud at the double as Blues cruise|
|Leno: It would be a dream to go to Euro 2016|
|Bertrand hoping to outshine England competition|
|Mexico loss ´difficult to swallow´ for Klinsmann|
|Messi: Sometimes Mascherano goes crazy|
|Butland to start for England - Hodgson|
|De Vrij not interested in Manchester United|
|Neymar: Messi, Suarez and I silenced critics|
|Muller: Premier League wages are tempting|
|Hazard: I am no longer untouchable at Chelsea|
|Wellington Phoenix 1 Newcastle Jets 2: Carney makes the difference|
|Ramsey: This is a great moment for Welsh football|
|Bale doing a fine job coping with pressure at Real Madrid - Beckham|
|Klopp: I made Lewandowski a star|
|South Korea v Jamaica: Asian high-flyers out to maintain good form|
|United States 2 Mexico 3 (aet): Aguilar wonder strike sends Mexicans to Confederations Cup|
|Klopp: I can´t walk on water like Jesus|
|Carragher: Benitez preferred Riise to Bale|
|Iran v Japan: Queiroz and hosts relishing test|
|Colorado Rapids 0 Montreal Impact 1: Drogba inspires visitors|
|Vardy hoping to cement England spot|
|Mexico confirm Osorio agreement|
|Euro 2016 Qualifying: As it stands|
|Strachan undecided on Scotland future|
|Hazard: Belgium deserve Euro 2016 qualification|
|Modric withdrawn from Croatia game due to injury|