Slovakia 2-0 Paraguay Paraguay took a big step towards a place in the last 16 with a stylish victory over a sluggish Slovakia that lifted them to the top of Group F.
A fine goal by Enrique Vera, curled in with the outside of his boot, gave the South Americans the lead and Carlos Riveros made the game safe with a brilliant late strike.
With a final group match against unfancied New Zealand to come, they must now be confident of reaching the knockout stages.
For Slovakia, their inability to raise their game has left them facing an early exit - particularly as they end their group fixtures against reigning champions Italy.
Two draws in the opening matches had left the group finely poised and Paraguay took the chance to assume control by deservedly clinching their first win.
It was achieved by a textbook execution of a high-pressing game and by maximising the attacking options from their 4-3-3 formation.
The interchanges between the frontline of Nelson Valdez, Lucas Barrios and Roque Santa Cruz - particularly in the first half - caused Slovakia all manner of problems.
And once again in this World Cup, it was a case of the latin brand of short, sharp passing and excellent movement dominating the more rigid European style.
For the first half an hour, Paraguay attacked at will - a deflected Santa Cruz shot brought a fine save from Jan Mucha, Paulo da Silva was inches away from a teasing cross and Cristian Riveros fired in a low shot from outside the box.
Exquisite interplay between Vera and Barrios saw the latter shoot just over before Valdez also fizzed an effort too high.
The breakthrough came on 27 minutes when a sublime Barrios pass split the defence and Vera curled the ball into the corner of the goal with the outside of the boot.
Only then did Slovakia stir and finally created a chance when a corner found Kornel Salata unmarked but he headed over the bar.
Paraguay immediately hit back and almost doubled their advantage after sloppy Slovakian defending let in Santa Cruz, whose low shot was kept out by the foot of keeper Mucha.
After the break, the Paraguayans appeared to play within themselves - sometimes a dangerous policy with such a slender lead to defend.
But Slovakia's lack of invention, flair and creativity was apparent as still they failed to exert any sustained pressure, a Stanislav Sestak cross that evaded Robert Vittek summing up the ineffectiveness of their play.
By contrast, when Paraguay broke from their policy of containment, they came within inches of extending their lead as Santa Cruz delivered an accurate centre and Vera sent his downward header narrowly past the upright.
Much had been expected of Slovakia playmaker Marek Hamsik but the Napoli man was desperately disappointing throughout and he was unable to inspire his team-mates.
Hamsik and his side were unable to find any cohesion and they were finally put out of their misery when Riveros smashed in a fierce drive from the edge of the box.
And while Paraguay have virtually secured their passage out of the group - they need only a point from their final match against New Zealand - Slovakia's failure to get out of first gear has put them on the brink of elimination.
Italy 1-1 New Zealand Rank outsiders New Zealand pulled off one of the biggest World Cup shocks of recent tournaments by holding defending champions Italy to a memorable draw in Nelspruit.
The Azzurri pressed hard for three points in a pulsating second half, but the All Whites stood firm and could have snatched a remarkable victory had 18-year-old West Brom forward Chris Wood not guided a late left-foot shot just wide of the post.
Regardless, it still represents easily the best result in the history of a nation which still does not have a professional football league and is far better known for its daunting rugby exploits.
And Italy, sorely lacking the creativity of injured AC Milan midfielder Andrea Pirlo, are now under real pressure to ensure an extended stay in South Africa: they must beat Slovakia on Thursday to guarantee a place in the last 16.
Should they only manage a draw, then New Zealand - 2000-1 to win the World Cup before the tournament started - could deny them with victory over Paraguay in their final Group F match.
Before this vibrant encounter at the Mbombela Stadium, Italy coach Marcello Lippi had identified New Zealand's aerial threat as the main danger to his team - and that warning proved prophetic within just seven minutes.
Simon Elliott whipped over a curling free-kick from the left and with tall defender Winston Reid soaring highest to flick the ball on, Italy captain Fabio Cannavaro - who lifted the ultimate prize in world football back in 2006 - could only help it into the path of Shane Smeltz.
The New Zealand striker looked significantly offside but was nerveless in prodding his 20th goal in 37 internationals past Federico Marchetti, who was deputising for Italy's injured first-choice keeper Gianluigi Buffon.
The holders nearly hit back instantly but All Whites goalkeeper Mark Paston clawed out a dangerously bouncing Riccardo Montolivo free-kick with a posse of blue shirts waiting at close quarters to pounce on any mistake.
Italy soon set about exploiting any means they could to try and gain an advantage - Cannavaro accusing Rory Fallon of using his elbow after another sturdy challenge in the air for which the Plymouth striker was booked.
But AC Milan's celebrated right-back Gianluca Zambrotta injected some flair into the Italian charge after 23 minutes, firing in a spectacular shot which whistled just past the top corner before Riccardo Montolivo surged forward in similar style to swerve the controversial Jabulani ball against the upright from fully 30 yards.
Italy made their pressure tell just before the half hour when Ipswich Town defender Tommy Smith conceded a penalty after tussling with Daniele De Rossi as they battled to get on the end of a cross, though the Roma midfielder seemed to tumble easily.
Referee Carlos Batres booked Smith before Juventus striker Vincenzo Iaquinta coolly slotted home, ignoring New Zealand's apparent attempts to match Italy's gamesmanship by trying to delay the kick.
Italy ended the first half in the ascendency but Lippi - knowing a win was of paramount importance - was still proactive at the break, bringing on Antonio di Natale and Mauro Camoranesi for Alberto Gilardino and Simone Pepe.
After Iaquinta wasted a defence-splitting De Rossi pass in the 60th minute, Lippi again made a further change with in-form Sampdoria striker Giampaolo Pazzini replacing the ineffective Claudio Marchisio.
Despite struggling to retain possession, New Zealand nearly took an unlikely lead when Ivan Vicelich lashed a fierce volley just wide.
With play really opening up - as many matches have in the second round of group matches following cagey encounters in the first - Montolivo once more showcased his long-range abilities but again Paston proved equal to his shot by palming it away from danger as the pressure mounted.
New Zealand coach Ricki Herbert soon replaced Fallon with Wood, who went so close to clinching a winning goal as he turned Cannavaro inside-out before guiding a well-struck low shot just the wrong side of the post.
The final opportunity fell to Italy as Argentine-born Camoranesi forced another decent stop from Paston - but destiny was on New Zealand's side and, on the balance of chances if not ther amount of possession, they fully deserved to take their World Cup points tally to two following their opening draw with Slovakia.