Barcelona coach Tito Vilanova says he would never consider managing the club's arch rivals Real Madrid.
Vilanova Reasserts Barca Loyalty
Vilanova made the declaration in Ser del Barca, an annual dedicated to the heritage of the Blaugrana.
"Coaching Real Madrid is one of the three things I would never do in football," the 44-year-old said.
"The other two would be throwing a game and promoting doping."
Pep Guardiola, who will take charge of Bayern Munich next season, also gave testimony in the book.
Barca's most successful boss said: "The club is not only about the players, or the president.
"More than anything, it is the people who come to watch our games, the old men sitting in bars playing dominoes and talking about Barca.
"Being asked why I love Barca is like being asked why I love my parents."