The victory gives Liverpool a fighting chance of finishing in the top four.
Frimpong told Liverpoolfc.com: “We won the derby obviously after us out of the Champions League, it was an important game for us and the fans.
“The spirits are good now, everyone is excited to go for the match on Saturday because Crystal Palace have beaten us three times this season. Obviously we want to show that we can beat them. We’re looking forward to the match.
“I feel like the matches coming up are really important – five more matches and we want to win all of them. I feel like we can do that. Obviously not finish the season on a ‘high’ but we can finish the season on wins. That’s what we want to do so we’ll go for it.
“We want to finish strongly and get Champions League. These matches are like finals so we’re going to give it our all, 100 per cent.”