The Peruvians have suffered consecutive defeats, meaning they're no chance of advancing to the knockout phase regardless of the result against Australia on Tuesday.

While the Socceroos need to win to have a chance of getting out of the group stage, Gareca says he and his players will be hellbent on winning to honour their fans.

"The public were incredible and that is what really hurts: that we were unable to pay back this fervour which the team awoke," Gareca said.

"I said before the tournament that everyone would be surprised with their passion and their love for the team.

"We will do the impossible to try and give them a goal or a win to celebrate in our final match (against Australia)."

Hordes of Peruvians have followed their team to Russia for the nation's first appearance at a World Cup in 36 years.

"We thank the Peruvian fans so much for the great support in Russia," goalkeeper Pedro Gallese said.

"We left everything on the field against two very tough opponents, but this does not end here - we are going to close the World Cup with the same attitude."

Peru's fixture against Australia in Sochi will probably be captain Paolo Guerrero's last World Cup game - less than a week after his first.

The 34-year-old, the all-time record goalscorer for his country, missed the first match in Russia after being suspended for suspected doping.

The ban was then reversed but the case remains open.

Guerrero maintains traces of cocaine found in his system came from coca tea he had consumed.

"He is a national hero," Gareca said.

"He was out for eight months and so the preparation was not the best.

"He did everything he could. We just hope things resolve themselves.

"He has done nothing wrong, it was a mistake."

Australian Associated Press