The Egypt striker's brace helped City reach the quarterfinals 3-1 at St James' Park and afterwards he paid tribute to wing pair Jeremy Doku and Savinho.
"They were unbelievable tonight, they made the big difference,” Marmoush said.
“They unlocked the game and they are two amazing, amazing wingers and it’s very nice to share the pitch with them.”
“The performance was amazing, we didn’t have the best start to the game, the passion we showed and how much of a team we were on the pitch made us all happy and it was nice to be on the pitch, of course, and we’re happy to reach the next round.”
“We didn’t start the game the best and after a while we started to get into the flow and exploiting the spaces that were there and we were happy we made it work.”