Paris Saint-Germain and Barcelona drew 2:2 in the first leg of the quarterfinal game in the Champions League at Parc Des Princes this past Tuesday. The game started according to the script with Lionel Messi scoring the first goal in the 38th minute of the match. Messi’s goal came after Barca’s Dani Alves beautifully curved the ball with outside of his foot into PSG’s penalty are and towards incoming Messi. Messi let the ball fall and bounce and then without hesitation unleashed a shot across the penalty area, past the diving goalkeeper, and into PSG’s goal. This was typical Messi, making the difficult look easy. However, in the 79th minute of the game PSG’s Zlatan Ibrahimovic equalized when he collected the ball inside the five-yard box that bounced off the far post after it was headed by his teammate. After the fortuitous rebound, Ibrahimovic was the quickest to react and simply tapped the ball into Barca’s goal. Barcelona players were quick to protest the goal, arguing that Ibrahimovic was in an offside position when the ball was last played by the PSG player. As we discuss it in much detail below, the replays showed that these protestations were well warranted.