Frimpong told Sky, via journalist Florian Plettenberg: "Now that it’s official, it’s the best feeling. When I first came to Leverkusen, Flo was the one that took me in. Now we’re doing it all over again – so it’s good. I’ve been in Leverkusen for four and a half years, and I won everything. I won the Pokal. I won the Super Cup. I won the Bundesliga. So I wanted a new challenge. With Celtic, I won the treble. With Leverkusen, the double. So in Liverpool, I also want to win trophies."