In-form Greece are favourites to take a first-leg advantage when they host Romania in their World Cup play-off on Friday.
Fernando Santos' side missed out on automatic qualification for next year's tournament in Brazil on goal difference, after finishing level on points with Bosnia-Herzegovina in Group G.
Greece should head into the first leg at Georgios Karaiskakis Stadium in Piraeus with plenty of confidence, though, having won their last six games without conceding a goal.
The 2004 European champions won eight of their 10 qualifiers and conceded only four goals in the process, amassing more points than any other second-placed side in the European qualifying groups.
However, Greece, who are ranked 15th in the world, will be without Kyriakos Papadopoulos against Romania as the Schalke defender continues to struggle with a knee injury.
Konyaspor striker Fanis Gekas, 33, has been recalled by Santos in an experienced squad that also includes skipper Giorgos Karagounis, 36, and 34-year-old midfielder Costas Katsouranis.
Greece have appeared in just two World Cup finals, the second of which was in South Africa three years ago.
Romania have not featured in the finals since the 1998 showpiece in France, but they kept their hopes of reaching Brazil alive by securing a play-off place in Group D.
Victor Piturca's side finished nine points behind runaway pool winners the Netherlands, but did enough to end two and three points above Hungary and Turkey.
They will be without captain Vlad Chiriches after the defender suffered a broken nose playing for Tottenham against Newcastle in the Premier League, but Piturca is hopeful that the side can cope without the centre-back.
"Chiriches is very important for us, not only because he's our captain. But, as I said many times, no team is dependent on only one player," he said.
Striker Adrian Mutu, Romania's joint-leading record goalscorer, was omitted from Piturca's squad, but the likes of Getafe striker Ciprian Marica and Genclerbirligi forward Bogdan Stancu will provide an attacking threat.
Meanwhile, Manchester City goalkeeper Costel Pantilimon was called up after Ciprian Tatarusanu injured his back in training. First-choice keeper Tatarusanu remained with the squad, though, and could feature on Friday.
|9||K. Mitroglou||14' 66'|
|Coach: Fernando Santos|
for G. Maniatis 77'
for K. Mitroglou 80'
for K. Katsouranis 86'
|Robben hopeful of finalising Bayern future|
|Sarri talks up Balotelli to Napoli|
|Everton need time and changes, says Koeman|
|Ancelotti lauds Muller after Bayern win|
|Sterling: I have more freedom under Guardiola|
|Mourinho: Maybe no Premier League title for United this season|
|Bayern laid down a marker - Rummenigge|
|Conte ´maybe the best in the world´ - Guardiola|
|Pioli laments Inter´s ´step backwards´|
|Ronaldo and Mourinho ´fully compliant´ with tax obligations, insists Gestifute|
|Napoli 3 Inter 0: Pioli dealt emphatic first Serie A defeat|
|Mainz 1 Bayern Munich 3: Lewandowski double inspires champions|
|´I have found my luck at Leipzig´ - Hasenhuttl dismisses Arsenal talk|
|Messi better to watch than Ronaldo, says Saviola|
|´I don´t care about age´ - Klopp committed to promoting youngsters|
|Koeman: Ibrahimovic was fantastic at 19|
|Pulis not letting court decision tarnish Palace memories|
|Carroll to make West Ham return against Arsenal|
|Real Madrid must win LaLiga and end Barca dominance - Roberto Carlos|
|Barcelona v Real Madrid: Zidane´s men eye LaLiga supremacy|
|Costa discipline issues in the past - Conte|
|A-League review: Melbourne Victory held by Perth Glory|
|I deserve criticism if Dortmund´s players do - Tuchel|
|Emery wants Cavani to dethrone Ibrahimovic|
|Martial is happy again, says Mourinho|
|Guardiola wary of Costa and Pedro|
|Messi, Ronaldo and Griezmann to battle it out for FIFA award|
|Conte reveals admiration for Guardiola philosophy|
|Mourinho: Schweinsteiger can stay at Man Utd|
|Conte: It is a pity Chelsea sold De Bruyne|
|Carrasco now competing with Griezmann and Gameiro - Simeone|
|Luis Enrique: Clasico not decisive in title race|
|Barcelona have no weaknesses - Zidane|
|Zidane: Ronaldo´s hunger for success key for Real Madrid|
|Barcelona midfielder Iniesta back for Clasico|
|Higuain does not need Dybala to score - Allegri|
|Summerbee: Chelsea blew it with De Bruyne|
|Ranieri, Zidane and Santos up for FIFA coach award|
|Chelsea paid me £50,000 to prevent child abuse revelations - Johnson|
|Vertonghen signs new Tottenham deal|
|Klopp hopeful on Lallana and Firmino|
|Ozil: Arsenal can win Champions League with a bit of luck|
|Sturridge exit a non-story, says Klopp|
|Debuchy out for up to six weeks|
|Pardew ready to turn around slumping Palace|
|Arsenal will not sign Cazorla replacement - Wenger|
|Courtois not getting carried away over Chelsea form|
|CAS to rule on Blatter case on Monday|
|Ozil refuses to rule out Real Madrid return|
|Sterling: I am keeping away from certain stuff I was doing last year|
|Leverkusen´s Volland out until 2017|
|Aloisi rules out Roar swoop for Keane|
|Pele reflects on ´sad moment´ of Chapecoense tragedy|
|Southgate urges downtime responsibility from England|
|Ranieri: Leicester signings not to blame for poor form|
|Sky is the limit for ´special´ Donnarumma, says Hart|
|Southgate drops Rashford Euro U21s hint|
|Chapecoense will rebuild with the world´s support, says vice-president|
|Toure can win Premier League for Manchester City - Hart|
|Only a matter of time until Balotelli gets Italy call - Zola|
|Ter Stegen can become new Valdes at Barca - Zambrotta|
|´Exceptional´ Costa just like Drogba, says Zola|
|Ronaldinho could play for Chapecoense|
|Garcia extends Manchester City deal|
|Injured Cazorla to miss another three months|
|Schmeichel has a gentle handshake, not like Wasilewski! - Ranieri|
|Lloris to follow Kane and pen new Spurs deal|
|Puel: I replaced Koeman to give Southampton youngsters a chance|
|Barcelona could have signed Ronaldo for €17million before Real Madrid move|
|Ancelotti keen for Lahm to carry on playing|
|Leipzig will last the pace in title race, says Ancelotti|
|If Bayern lose I´ll cry and miss El Clasico! - Ancelotti|
|No Europe could give Conte edge over Guardiola - Summerbee|
|Southgate keeps Rooney as captain but calls for leaders to emerge|
|Real Madrid dominate FIFA FIFPro World11 nominations|
|Sigurdsson: Kane will be Spurs´ main man for years to come|
|Ronaldo can beat Messi to next two Ballons d´Or - even if he loses the Clasico|
|No break clause in Southgate´s England contract|
|Kane signs new contract with Tottenham|
|Phelan hopeful on Hernandez and Maloney for Boro trip|
|Pioli not entertaining Messi to Inter possibility|
|Conte doing a remarkable job at Chelsea - Zola|
|Nesta amazed by ´special´ Totti|
|Elneny sick in Saints loss - Wenger|
|Atletico Nacional supporters pay tribute to Chapecoense air crash victims|
|Enzo Zidane targets more opportunities after ´special´ debut goal|
|Mkhitaryan excited by United display|
|Toronto FC 5 Montreal Impact 2 (aet, 7-5 agg): Hosts storm to maiden MLS Cup berth|
|Emotional Cavani brings up 100 amid Chapecoense tributes|
|Barca did not take Hercules lightly, insists Luis Enrique|
|Emery feels PSG are slowly making progress|
|Barcelona do not need to be scared, insists Rafinha|
|Simeone wants consistency from Gaitan|
|Wenger blasts sloppy Arsenal after Southampton loss|