Argentina remain second favourites to lift the World Cup but they have struggled to convince so far in Brazil and look set for a tricky afternoon against a Switzerland side who have lost just one competitive match since 2011.
Having scraped past Bosnia, Iran and Nigeria - each by a single goal - to top Group F, Argentina know they will have to up their game and rely less on Lionel Messi's heroics if they are going to progress much further.
Will the Swiss roll over?
Having kept seven clean sheets in qualifying, Switzerland were surprisingly generous in their 5-2 defeat to France and that thumping means they have conceded more goals than any team that made it out of the group stage. Despite Argentina having let in just three, they have looked far from resolute as every opponent they have faced has caused them problems. At the other end of the pitch, both teams are among the top eight when it comes to total shots taken. Only three sides had more than Argentina's 46 efforts on goal during the group stage, while Switzerland were close behind on 42.
Don't let the quality pass you by
These two sides are capable of serving up a high quality encounter given the stylish passing that has been in evidence so far. Argentina and Switzerland have been among the top passers during the group stage, each finding their teammates with 89 per cent of passes - which is only beaten by Germany and Italy. Argentina are alone in boasting both quantity and quality, however, with Javier Mascherano pulling the strings behind their impressive array of attacking talent, they've kept the ball for fun - attempting over 400 passes more than their opponents. Where they both may suffer is with individual errors. No team at the finals has made more mistakes in possession than Switzerland's 22 per match, while Argentina are close behind them with an average of 20.7.
It could get Messi late on
You will need to keep a close eye on this one right until the very end. After the last-gasp drama of Sunday's matches the scene is set for another late goal and these are two teams with a penchant for thrilling finales. Seven of Switzerland's 10 goals since mid-May have arrived after the 70th minute, including Haris Seferovic's 90th minute winner against Ecuador and both of their consolations against France. Meanwhile, it took Lionel Messi over 90 minutes to eventually break down Iran in Argentina's second group game. Switzerland are a side used to suffering late heartache at the hands of Barcelona's playmaker. When the teams last met in 2012, the match was heading for a 1-1 draw before Messi scored in the 88th and 90th minutes to complete a hat-trick.
With both sides' fondness for keeping the ball, this looks set to be an even encounter and it may take another moment of magic to separate them. Both sides were error-prone and inconsistent during the group stage, but possess creative players who can carve a chance out of nowhere should the other slip up first. It could well be the more mentally alert side which prevails during another sweltering early kick-off.