There's your first goal! Brazil are 1-0 ahead of South Korea in this Olympic semifinal. The play started with Neymar and Sandro applying heavy pressure at the midfield, and eventually the ball broke forward for Brazil. That left Oscar running at the Korean defence, with Neymar to his left and Leandro Damiao just ahead of him.
The banks of red shirts collapsed inwards, protecting Lee Bum-Young's goal from those three threats. But none of those were options were in Oscar's plans. Instead, the 20-year-old threaded an excellent ball to Romulo, who making a good run down the right, and the midfielder met the pass first time with a low shot just inside the near post.
It wasn't a very good shot, though, and Lee should have had it. The ball went under both his outstretched foot and his glove before nestling home to give Brazil the lead. That's some very poor goalkeeping. The Selecao won't care.