Australia will be battling it out to reach second, but they are heavily relying on France securing a victory over Denmark.
The South Americans, on the other hand, have not scored at all during their World Cup campaign and will be fighting to take home a few points.
They do have a slight upperhand on Australia, whose last four competitive goals were spotkicks. Peru will be desperate to keep their campaign alive and kicking.
The Socceroos will need to win this game, but will also need to make up the goal difference. The pressure is on.
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Live Updates
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16:29
69 mins: DENMARK 0 - 0 FRANCE
Where has that come from? Substitute Fekir gets the ball in a good area, puts it on his left foot and fires a shot at goal, Schmeichel had it covered though and it hits the side netting
16:27
67 mins: DENMARK 0 - 0 FRANCE
The game is Moscow is terrifyingly one-paced. Slow! there is no urgency in the play and the players lack intensity, Griezmann is taken off and it's been an enterprising but ineffective day for the Atlético Madrid man
16:24
62 mins: PERU 2 - 0 AUSTRALIA
19 year-old Arzani is on the field for the Socceroos and he comes forward but gets dispossessed, Peru are taking control of this game now and their fans are loving it
16:19
58 mins: DENMARK 0 - 0 FRANCE
The ball falls to Eriksen on the outside of the French area, the header away is a poor one and Eriksen collects but his shot is wide, finally a bit of excitement in Moscow!
16:14
52 mins: PERU 2 - 0 AUSTRALIA
He's arrived! 38-year-old Tim Cahill is brought on for Juric, if he rescues this game for Australia there's a good chance they'll make him Prime Minister when he gets back
16:12
50 mins: PERU 2 - 0 AUSTRALIA - Guerrero
GOAL! It could be all over for Australia, Carillo gets the ball on the left and runs it into the box, his shot gets a deflection off the defender and Guerrero is the first to arrive he swings it around and finds the net
16:10
50 mins: DENMARK 0 - 0 FRANCE
Griezmann finds a little pocket of space outside the Danish box, he first tries to feed it to Giroud but it is cleared, it comes back to him and he shoots but it's straight at the keeper
16:06
SECOND HALF KICK OFF: PERU 1 - 0 AUSTRALIA
Yotun has been replace with Aquino for Peru and the Socceroos get us back underway, it's last chance saloon for the men from down under
15:54
Denmark doing enough so far in a rather laborious first half against France, both sides will be content with their performance but it is not a game for the neutrals
Australia have it all to do now, 45 minutes to score two goals, 45 minutes to stay in the World Cup, do we hear someone calling for a saviour?
15:50
HALF TIME: DENMARK 0 - 0 FRANCE
PERU 1 - 0 AUSTRALIA
15:49
45+2 mins: DENMARK 0 - 0 FRANCE
Yellow Card for Jorgensen, a corner for Denmark leads to Griezmann getting a breakaway and the Danish defender cannot catch him, he takes one for the team by bringing Griezmann down from behind and that'll be half-time!
15:45
43 mins: DENMARK 0 - 0 FRANCE
The ball comes over the top of the Danish defence and Griezmann makes a good run in behind, he brings the ball down gives it to Giroud who hits it first time... but it's over the bar, Griezmann looked to be offside as well
15:43
40 mins: PERU 1 - 0 AUSTRALIA
Ally McCoist on commentary once again claiming Australia as the better side in this first half, I don't disagree but they need to find better final balls if they are to get something out of this game. Mooy gets a free kick just outside the area but sends it over the heads of everyone
15:41
38 mins: DENMARK 0 - 0 FRANCE
France break away into tspace with Dembele storming forward, he lays it off to Griezmann on the edge of the area and he moves the ball onto his left foot before taking a shot. It's pretty tame though and Schmeichel gets an easy save as the ball lands straight into his hands
15:37
33 mins: PERU 1 - 0 AUSTRALIA
It should be level! Rogic gets the ball in mid-field and dissects the centre backs with a beautiful pass to Kruse who draws the goalkeeper to him before passing it back to Leckie, Leckie gets to the ball puts puts it wide under a challenge from Santamaria
15:31
28 mins: DENMARK 0 - 0 FRANCE
Christian Eriksen goes down in the French area after a challenge from Mandanda, the goalkeeper, Cornelius recevied the ball on the right wing and perfectly timed a low cross into the box and Eriksen split the centre-backs before Mandanda met him. No penalty though!
15:29
26 mins: PERU 1 - 0 AUSTRALIA
Australia need to win this game, and now they need to come from a goal behind, Leckie passes the ball to Rogic who stays strong on his feet from a Ramos challenge, Rogic moves into the box switches to his left foot and forces Gallese into the save
15:25
23 mins: DENMARK 0 - 0 FRANCE
Appeals for a handball against Jorgensen in the Danish area but the referee plays on and Denmark get the ball clear
15:21
17 mins: PERU 1 - 0 AUSTRALIA - Carrillo
GOAL! What a volley! Peru moved forward in their first meaningful attack, the Australian defence holding their line, Yotun runs the ball onto the corner of the box before crossing it to Carrillo who meets it on the volley and finds the back of the net
15:17
14 mins: DENMARK 0 - 0 FRANCE
N'zonzi flicks the ball to Hernandez who has run on the overlap down the left hand side, he brings the ball into the area and links with Giroud in a one-two and the French striker tries a subtle chip that forces Schmeichel to push the ball out for a corner
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What time is it?
Australia vs Peru kicks off at 15:00 at the Fisht Olympic Stadium in Sochi.
Where can I watch it?
ITV will be showing live coverage in ITV4. It will also be available via the ITV Hub on the ITV website.
Odds:
Australia: 9/5
Peru: 11/8
Draw: 23/10
Prediction:
Australia 2-1 Peru. The Socceroos will be working extra hard to secure a place in the top 16, but they will be banking on a Denmark defeat. The South Americans aren't the likely winners and without a point will end up with an early World Cup exit, but who knows? As we've seen so far, anything can happen.
