Rafael Márquez Álvarez is a Mexican football coach and former player who played as a defender. He is the current head coach of Spanish team Barcelona Atlètic. Nicknamed El Káiser, he is regarded as the best defender in Mexico's history and one of the best Mexican players of all time.

Futbol Club Barcelona Atlètic, commonly referred to as Barça Atlètic or Barça B, is a football team based in Barcelona, Catalonia, Spain, that competes in Primera Federación – Group 1, the third tier of the Spanish league system. Founded in 1970, it is the reserve team of Barcelona and it plays its home fixtures at Johan Cruyff Stadium.