French superstar Kylian Mbappe scores a brace for Madrid to inflict Barcelona's first domestic defeat of the campaign. French superstar Kylian Mbappe scores brace for Madrid to inflict Barcelona’s first domestic defeat of the campaign. Real Madrid became the first side to beat Barcelona in LaLiga this season, defeating the league leaders 2-1 at Camp Nou with a brace from Kylian Mbappe.Mbappe's 11th goal in 10 LaLiga matches.