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FILE - In this May 17, 2006 file photo, Barcelona's Ronaldinho from Brazil lifts the trophy after they won the UEFA Champions League against Arsenal in the Stade de France in Saint-Denis, outside Paris, France. The brother and agent of 2005 Ballon d'Or winner Ronaldinho says on Tuesday, Jan. 16, 2018, the former Brazil and Barcelona playmaker has retired from football. (AP Photo/ Luca Bruno, File)

FILE - In this May 17, 2006 file photo, Barcelona's Ronaldinho from Brazil lifts the trophy after they won the UEFA Champions League against Arsenal in the Stade de France in Saint-Denis, outside Paris, France. The brother and agent of 2005 Ballon d'Or winner Ronaldinho says on Tuesday, Jan. 16, 2018, the former Brazil and Barcelona playmaker has retired from football. (AP Photo/ Luca Bruno, File)

Champions League slideshow

Champions League photos