Some players simply dont play/perform as well at international level when compared to their club form. The most obvious case I can think of is Sergio Aguero who fails to deliver in official games for Argentina
Paolo Guerrero most probable replacement has not exactly been scoring for fun at international level
Raul Ruidiaz has 3 goals in 24 games..and one of those goals was with his hand (vs Brazil in Copa America 2016). On the flipside he scores for fun in Mexico with 27 goals in 43 games.
Farfan has only recently come back into the fold and while he was away in exodus, Raul Ruidiaz took up the mantle of Guerrero's first option. Most people believe Farfan should start at CF but the Peruvian coach is loyal to a fault with his players and it would not surprise me if he gives Raul Ruidiaz the starting spot and leaves Farfan on the bench
In terms of scoring ability Edison Flores has the most goals in the campaign with 5 (vs Chile, Uruguay, Ecuador, Bolivia and Paraguay). Guerrero also had 5 (his 6th was determined to be Ospina's own goal).
In terms of Peruvian local based players taking the pitch on Saturday I envision that only 2 will start.
Alberto Rodriguez - 33 years of age - Centreback - massive amounts of international experience against the likes of Falcao, Cavani, Suarez, Sanchez, Messi, Brazilians, etc. He also played for many years in Portugal. He will also be captain.
Aldo Corzo - 28 years of age - probably the most technically weak player in the team. But he has heart ill give him that. Luis Advincula who plays in Mexico is a much better player but had discipline problems, hence the coach is sticking with the guy who is a model pro
the other 9 players all play in Mexico (Gallese, Ruidiaz), Brazil (Cueva, Trauco), Ecuador (Ramos), Netherlands (Tapia), MLS (Yotun), EPL (Carrillo), Denmark (Flores) and maybe Russia (Farfan)
Off the bench the likely players are
Hurtado - plays in Portugal
Polo - plays in Mexico
Aquino - plays in Mexico
Advincula - plays in Mexico
Farfan - plays in Russia
Reyna - plays in MLS
Pena - plays in Spain (second div)
So essentially hardly any Peruvian based players will more than likely take the field