Argentina recorded an immediate response to their defeat to England by teaching Romania a rugby lesson in a 43-8 win in Invercargill on Saturday.
The Pumas were full value for their win in a one-sided Pool B encounter that saw seven tries being scored -- six of them to Argentina.
Santiago Fernandez, Juan Manuel Leguizamon, Juan Figallo, Lucas Gonzalez Amorosino, Florin Vlaicu and Genaro Fessia all crossed for tries -- and Argentina could have scored more but for some desperate Romanian defending.
There was also am improved showing with the boot as centre Martin Rodriguez, who was guilty of missing too many efforts in the 13-9 loss to England, was more accurate this time as he added 13 points from the kicking tee.
He missed an early penalty attempt with barely three minutes up on the clock but made up for his blunder by converting Argentina's opening try to pivot Fernandez, who strolled over in the sixth minute.
The Pumas wasted little time in scoring their second when -- just two minutes later -- flanker Leguizamon used his pace and power to charge through two would-be defenders to crash over beside the posts.
Romania had hardly touched the ball twelve minutes into the match, but were rewarded for their best spell of pressure with a penalty and fly-half Tiberius Dimofte made no mistake.
However, the Pumas extended their lead even further when prop Figallo burrowed his over from close range before full-back Amorosino secured Argentina's four-try bonus point when he broke through some tired tackling after a concerted spell of pressure.
Romania weren't prepared to roll over that easily though and hit back with a try through wing Ionel Cazan, who flew over in the corner after the Oaks had stretched the Pumas defence for the first time in the match.
Dimofte missed the conversion as well as a penalty attempt on the stroke of half-time that saw Romania head into the break 26-8 down.
Argentina started the second half in the same fashion they began the first -- with a missed penalty followed by a successful one through Rodriguez.
Romania kept the Pumas tryless until prop Mihaita Lazar was sin-binned for repeated infringements.
Argentina finally broke the Romania resistance when replacement back Juan Jose Imhoff stepped and then showed electric acceleration to score a converted try under the sticks.
Romania thought they had hit back when Dimofte intercepted and found Daniel Carpo in support. The number eight shipped the ball to Cazan but as the winger attempted to keep the move alive, Argentina were able to hack the ball on -- with replacement flanker Fessia picking up and running in unopposed to score.
Game, set and match Argentina!
The win sets up a showdown with Scotland in Wellington next Sunday with the winner in pole position to ensure a slot in the quarter-finals, while the east Europeans are now set to make it seven straight failures to get out of the pool stages at the World Cup.
The scorers:
For Argentina:
Tries: Fernandez, Leguizamon, Figallo, Amorosino, Imhoff, Fessia
Con: Rodriguez 5
Pen: Rodriguez
For Romania:
Try: Cazan
Pen: Dimofte
Argentina: 15 Lucas González Amorosino, 14 Gonzalo Camacho, 13 Martin Rodriguez, 12 Marcelo Bosch, 11 Horacio Agulla, 10 Santiago Fernandez, 9 Nicolas Vergallo, 8 Juan Martin Fernandez Lobbe, 7 Juan Manuel Leguizamon, 6 Julio Farias Cabello, 5 Patricio Albacete, 4 Manuel Carizza, 3 Juan Figallo, 2 Mario Ledesma, 1 Rodrigo Roncero.
Replacements: 16 Agustin Creevy, 17 Martin Scelzo, 18 Mariano Galarza, 19 Alejandro Campos, 20 Alfredo Lalanne, 21 Nicolas Sanchez, 22 Juan Jose Imhoff.
Romania: 15 Iulian Dumitras, 14 Madalin Lemnaru, 13 Csaba Gal, 12 Constantin Gheara, 11 Ionel Cazan, 10 Tiberius Dimofte, 9 Florin Surugiu, 8 Daniel Carpo, 7 Ovidiu Tonita, 6 Mihai Macovei, 5 Cristian Petre, 4 Valentin Ursache, 3 Paulica Ion, 2 Marius Tincu (c), 1 Mihaita Lazar.
Replacements: 16 Bogdan Suman, 17 Silviu Florea, 18 Valentin Poparlan, 19 Daniel Ianus, 20 Valentin Calafeteanu, 21 Marin Dumbrava, 22 Florin Vlaicu
Referee: Steve Walsh (Australia)
It quickly turned into a procession in Waikato as Ma'a Nonu caused all kinds of problems for the Brave Blossoms, who had rested several of their first-choice players. New Zealand had done something similar during midweek while niggles for Richie McCaw and Dan Carter saw them pull out soon after being named in the starting XV.
Intensity was the name of the game as the protagonists went at each other hammer and tongs.
Four penalties and a drop-goal from Dan Parks were enough to hand Scotland four pool points in a try-less encounter in wet conditions.
The Canucks outscored Tonga three tries to two in a cracking game, and were full value for their win after leading 10-7 at half-time.
Samoa speedster Alesani Tuilagi bagged a hat-trick to help his team along to a comprehensive six-tries-to-two Pool D win.
Trailing 16-10 with fifteen minutes left, the Springboks had to dig deep to produce a try for replacement wing Francois Hougaard and clinch a hard-fought victory by the skin of their teeth.
The match was played in rainy conditions and although Ireland held the upper hand in most facets of play, they struggled to breach their opponents' defence.
The Golds had struggled to shake off the Azzurri until a second-half masterclass saw them pull away from Nick Mallett's passionate outfit.
The Pumas will count themselves unlucky not to have done what they did to France four years ago after shelling 18 points due to wayward attempts from Felipe Contepomi and Martin Rodriguez.
A bonus point means that les Bleus move level with New Zealand at the top of Pool A, but it was far from plain sailing as the Japanese made a mockery of many of the bookies' predictions.
The brave Namibians can hold their heads up high after producing a more than competitive performance, leading twice in the early stages of the match. However Fiji's attacking prowess was just too hot to handle in Rotorua.
Against all odds, Romania had the Scots hanging on the ropes after leading by three points with ten minutes of the match remaining.
It was hardly a vintage 80 minutes but with the job done and dusted before the break, it is difficult to blame the hosts for taking their foot off the gas.
This is what Test rugby is all about!
The lethal finisher, who was playing his third match since suffering that horrific Super Rugby injury, was one of four on the comeback trail.
Both teams scored two tries but three penalties from the boot of home fly-half Dan Parks proved the difference after 80 minutes.
Les Bleus -- who beat the Irish 19-12 in Bordeaux last Saturday -- will name their RWC squad on Sunday while Ireland name theirs on Monday.
Wales led 14-3 at half-time thanks to try from number eight Andy Powell and a handful of penalties from James Hook.
The All Blacks scored the only try of the game, but were outmuscled up front by their hosts. The whole Bok team tackled their hearts out and Steyn's strong tactical kicking, especially in the second half, allowed them to keep the visitors pinned back.
Despite plenty of possession and territory for the home side, it was USA errors that allowed Canada to run in three tries during the match.
The Azzurri trailed 17-14 at half time before two second half tries courtesy of their experienced front row saved the day.
France raced to a deserved 13-0 lead by the half-hour mark as they dominated every facet of play.