An Inter player was about to enter the area and was clearly tripped, the problem was to determine if the foul had been inside the area. Larrionda wasn´t sure and looked at assistant Rial, who was even less sure. Finally the referee decided to concede a free-kick and not a penalty. It was very difficult to appreciate, but after watching 3 or 4 times on TV, it seemed to have been inside.
Appart from that, Larrionda did a very good job. He was always near the actions, booked properly and correctly sent-off Boca´s attacker Noir after an imprudent action against Magrao.