Herrera is well aware of the controversy comments from PSG teammates about Messi have made in his homeland.
He told El Larguero: "Link up Neymar, Kylian Mbappé and Lionel Messi? I don't know how financial fair play works, but I don't believe it, although anything is possible in football.
"Last year, when everyone in Barcelona was telling us about Neymar, we didn't like it. As I didn't like it, I'm not going to talk about a Barça player. I have a lot of respect for FC Barcelona, their coach and of course for Leo Messi and I will not dwell on this subject.
"Leo Messi is the best player I have ever seen and the best I have ever played against."