Barcelona secured an unassailable seven-point lead over second-placed Real Madrid with two games left to play.

And what a goal it was for the player who still wears dental braces and sports a new dyed-blond hairdo. The 17-year-old struck the winner in Barcelona’s 2-0 victory at crosstown rival Espanyol on Thursday when he slid past two defenders outside the area and whipped one of his now trademark left-footed curlers into the corner of the net.