Jorge Costa, the former central defender and captain of FC Porto's 2004 UEFA Champions League-winning team, has died at the age of 53 after suffering a cardiac arrest. Costa was serving as the director of football for FC Porto at the time of his death, which occurred on the club's training ground. He played 50 international matches for Portugal and was a key figure in Porto's successes under manager José Mourinho, including winning the UEFA Cup in 2003 and the Champions League in 2004. FC Porto confirmed the news and expressed deep sadness and dismay. José Mourinho paid tribute to Costa, describing him as an important part of his history and leadership on the field. The football community, including former teammates and clubs, has mourned his passing.