Argentina leads Group B with six points, but Greece can tie that total with a win today.
The longer Greece stays in the game, the better chance it has of pulling this one out.
Even though Higuain recorded a hat-trick against South Korea, that's not the only reason he is on here.
The 22-year-old forward notched 27 goals and five assists in 32 matches for Spanish giant Real Madrid this past season, so he clearly has a knack for finding the net.
Higuain doesn't always need the spotlight, either. The striker has great awareness and is also willing to set up teammates.
With 20 goals in 49 appearances, Gekas is probably the biggest goal-scoring threat the Greeks have.
The Eintract Frankfurt (Bundesliga) striker tallied 11 goals in just 10 games during World Cup qualifying for Greece. Gekas must continue that magnificent streak if Greece wants to topple Argentina.
Although he is not particularly fast or strong, Gekas has an uncanny ability to be in the right place at the right time, allowing him to rack up close-range goals.
At only 26-years-old, the fiery Mascherano is already Argentina's captain.
A master of breaking up plays with his positioning, the Argentine midfielder is an irreplaceable asset to the national side.
Mascherano's work rate is basically unparalleled. Unfortunately, the same can be said for his temper.
Known for getting into heated conversations with referees, Mascherano needs to keep his cool so he doesn't miss any elimination matches.
As Greece's captain and most experienced player, Karagounis makes the team go.
In the midfield, the "Greek Gattuso" uses his creativity to get the offense flowing. Karagounis is also a valuable asset on the defensive side.
Best known for his game-winning blast against Portugal in Euro 2004, Karagounis will look to repeat that feat against Argentina.
For Messi, taking on a handful of players at a time is nothing new.
The Argentinian talisman is a once-in-a-generation player, whose skill can be described as jaw-dropping, awe-inspiring, magical, and — you get the picture.
Although he hasn't tallied any goals in the 2010 World Cup yet, Messi has looked great and provided a spark in other ways.
Unfortunately for the Greeks, there isn't much they can do to contain the Barcelona superstar.
A star during Greece's famous Euro 2004 run, Katsouranis is still an important piece in the Greek XI.
The 31-year-old isn't the flashiest player, but he gets the job done by organizing the midfield and being incredibly reliable.
Katsouranis knows Greece is a dangerous team. The Greeks have played in big games before and play the underdog role extraordinarily well.
If Argentina isn't careful, Katsouranis could lead Greece to a major upset.