Farfan, 35, is yet to play a game in this campaign, which has eight more rounds remaining, after sustaining a knee injury last year.
Nico Schulz nets late winner on international debut to help Germany edge past Peru in friendly encounter
Nico Schulz enjoyed a dream international debut on Sunday, as the Hoffenheim defender scored a late winner in front of his home crowd to give Germany a hard-fought 2-1 friendly win over Peru in Sinsheim.
FIFA World Cup 2018: Peru striker Jefferson Farfan still in hospital two days after suffering concussion during training
Peru's striker Jefferson Farfan was injured two days ago during a training session when he clashed heads with a teammate. The Peruvian striker is still hospitalised.
FIFA World Cup 2018 qualifiers: Peru beat New Zealand to seal last Russia berth, reach finals after 35 years
Farfan struck in the 27th minute and Ramos scored in the 65th to give Peru their fifth overall World Cup finals appearance and the first in 35 years.