Ronaldo Luís Nazário de Lima, known as Ronaldo or Ronaldo Nazário, is a Brazilian former professional footballer who played as a striker. He is the owner of Brasileiro Série A club Cruzeiro and owner and president of Segunda División club Real Valladolid. Nicknamed O Fenômeno and R9, he is considered one of the greatest players of all time. As a multi-functional striker who brought a new dimension to the position, Ronaldo has been an influence for a generation of strikers that have followed. His individual accolades include being named FIFA World Player of the Year three times and winning two Ballon d'Or awards.

In the sport of association football, a forward is an outfield position which primarily plays further up the pitch than midfielders and defenders. As with any attacking player, the role of the forward relies heavily on being able to create space for attack. Their advanced position and limited defensive responsibilities mean forwards normally score more goals on behalf of their team than other players.