Cristiano Ronaldo Debuts for Manchester United On this day, in 2003 Ronaldo made his Manchester United debut as a substitute for Nicky Butt on opening day of the 2003-04 season. August 16, 2003 Sport: Soccer Trivia What Are the Five Events That Make Up the Modern Olympic Pentathon? Which Nations Won the Gold, Silver and Bronze Medals the Last Time Baseball Was an Olympic Sport? sports in this article Soccer tags in this article Fan On This Day SportsEngine