Rocha and Gyepes missed last weekend's defeat at Walsall due to hamstring injuries but both have been passed fit.
Gyepes has signed a new month-long contract but Pompey are letting other players leave to cut costs.
Full-back Jon Harley has made himself available for what looks like being his last game for the club but midfielder Brian Howard, who will also be out of contract next week, is missing with a groin injury.
Caretaker boss Guy Whittingham has recalled young defender Dan Butler from a loan spell at Havant & Waterlooville and he will be in the squad.
Striker James Keene should also be involved after completing his loan move from Swedish club Elfsborg.