Oscar dos Santos Emboaba Júnior (born 9 September 1991), known as Oscar, is a Brazilian footballer, who plays as an attacking midfielder or winger for Premier League club Chelsea and the Brazil national team.

Oscar began his career at São Paulo, where he won the Brazilian Serie A in 2008. In 2009, he went to court against the club due to irregularities in his contract. After a series of controversies he left for Internacional, where he spent the next three years of his career. His displays for club and country led to him signing for Premier League club Chelsea in 2012.

In the opening match of the tournament, on 12 June against Croatia in São Paulo, Oscar scored in injury time from outside the box for the last goal in a 3–1 win.