Eels coach Daniel Anderson told AAP that his side's win was encouraging albeit scrappy at times.
"I thought we just battled and we had to and I think we showed some little signs in the game that we've made some forward progress, even since last week when most of the big boys didn't play," Anderson said.
"We've still got some areas that we can work on, which is important."
Embattled Panthers coach Matthew Elliott praised his side's defence.
"We did some really good stuff and showed some intent defensively, obviously in attack, we've got some work to do." Elliott said.
Eels star Jarryd Hayne faces an anxious wait after being placed on report for a tackle that left Panthers' winger Shane Elford dazed.
Hayne played five-eighth for half the game, scoring two tries. Regular five eighth Feleti Mateo was a stand out at lock.
PARRAMATTA EELS 18 (J Hayne 2 K Inu tries L Burt 3 goals) PENRITH PANTHERS 10 (M Jennings J Sammut tries M Gordon goal) Saturday 21 February CUA Stadium, Penrith. Referees: J Maxwell A Devich. Crowd: 5,783.
TEAMS PANTHERS: 1. Michael Gordon 2. Shane Elford 3. Michael Jennings 4. Brad Tighe 5. Junior Tia-Kilifi 6. Wade Graham 7. Jarrod Sammut 8. Tim Grant 9. Paul Aiton 10. Adam Woolnough 11. Gavin Cooper 12. Matthew Bell 13. Nathan Smith Interchange: 14. Masada Iosefa 15. Frank Puletua 16. Luke Lewis 17. Trent Waterhouse 18. Maurice Blair 19. Andrew Emelio 20. Joseph Paulo 21. Ben McFadgeon EELS: 1. Luke Burt 2. Krisnan Inu 3. Ben Smith 4. Taulima Tautai 5. Eric Grothe 6. Jarryd Hayne 7. Brett FINCH 8. Fuifui Moimoi 9. Matthew Keating 10. Josh Cordoba 11. Nathan Hindmarsh 12. Weller Hauraki 13. Feleti Mateo Interchange: 14. Kevin Kingston 15. Kris Keating 16. Tim Mannah 17. Broderick Wright 18. Joel Reddy 19. Jonathan Wright 20. Joe Galuvao
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