 Complete the following phrase:  Messi opened the 201516 season by scoring twice from free kicks in Barcelonas 54 victory after extra time over Sevilla in the UEFA Super Cup. On 16 September, he became the youngest player to make 100 appearances in the UEFA Champions League in a 11 away draw to Roma. After a knee injury, he returned to the pitch on 21 November, making a substitute appearance in Barcelonas 40 away win over rivals Real Madrid in El Clásico. Messi capped off the year by winning the 