On 11 August, Barcelona started the 2015–16 season winning a joint record fifth European Super Cup by beating Sevilla FC 5–4 in the 2015 UEFA Super Cup. They ended the year with a 3–0 win over Argentine club River Plate in the 2015 FIFA Club World Cup Final on 20 December to win the trophy for a record third time, with Suárez, Messi and Iniesta the top three players of the tournament. The FIFA Club World Cup was Barcelona's 20th international title, a record only matched by Egyptian club Al Ahly SC. By scoring 180 goals in 2015 in all competitions, Barcelona set the record for most goals scored in a calendar year, breaking Real Madrid's record of 178 goals scored in 2014.

Who did Barcelona beat to win the 2015 UEFA Super Cup?