Greece took a giant stride toward World Cup 2014 with a 3-1 first-leg win over Romania in Friday's play-off.
Konstantinos Mitroglou continued his fine scoring form, registering a brace for the hosts, while Dimitrios Salpingidis also found the net.
Bogdan Stancu scored a loan riposte for the Romanians, who also had Costin Lazar sent off.
The result leaves Victor Piturca's side on the brink of elimination and in need of a rousing response on home soil.
Here's a look ahead to that second leg, along with a few key battles.
What: World Cup play-off, second leg
Who: Romania vs. Greece
Where: National Arena, Bucharest
When: Tuesday, November 19
Start: 9 p.m. local time, 8 p.m. GMT
Dorin Goian vs. Konstantinos Mitroglou
The absence of Vlad Chiriches is a huge blow for Romania, who looked hesitant at the back throughout the first leg.
Without the Tottenham defender, who is sidelined by a broken nose, the responsibility falls on the experienced Dorin Goian, who struggled to contain Konstantinos Mitroglou on Friday.
The Greek striker is in the form of his life this season, with 20 goals in 19 games for club and country. His presence and the lack of Chiriches makes a Greek away goal increasingly likely.
Gabriel Torje vs. Jose Holebas
Romania have no choice but to attack in numbers and will rely on Espanyol's Gabriel Torje for the bulk of their creativity.
Up against him should be Jose Holebas at left-back, who did well to suppress his influence on Friday, although it was Torje's final ball that provided Romania with their goal.
Holebas will look to restrict his space and limit his opportunities to deliver, while Torje will hope to pepper the penalty area with crosses.
Ciprian Marica vs. Sokratis Papastathopoulos
For Romania to secure an unlikely triumph, they need to find their scoring boots. Ciprian Marica boasts an impressive scoring record at international level and will be tasked with finding the net in this key tie.
Aiming to stop him will be Borussia Dortmund's Sokratis Papastathopoulos, who kept Greece's back four organised during the first tie.
Both are strong players, formidable in the air, who should be jostling with each other throughout this game.
Despite the two-goal difference, an early strike puts this match back in the balance, thanks to Romania's away goal in Greece.
What detracts from the host's chances is how easily the Greeks carved them open on Friday. Greece have enough fire-power to score again, which will leave Romania with too much to do.
Romania 1-1 Greece (Greece qualify 4-2 on aggregate)