Enrique's return as head coach was confirmed yesterday.
Pique told Marca: "I don't know what happened, I haven't spoken with my Barca's team-mates because they played Monday against Romania.
"All that I know is what I've read in the media and I suppose we'll know more in a few days.
"All I can say is that I'm really excited that Luis Enrique is back as Spain coach. All that's gone on, I suspect only a few will know."