An additional fourth substitute will be allowed in extra-time in matches played at the Rio Olympics and at the Club World Cup later in the year.
Spain Manager Vicente Del Bosque looks back on Spain's failure in the 2014 FIFA World Cup.
Despite success at club level through the last decade, Messi has been criticised for Argentina's 2014 World Cup and 2015 Copa America losses.
"There's always some idiot, to put it mildly. [Messi's] a gentleman. When he scored the goal he raised his hands apologising," River's president said.
River Plate were not expected to beat Barcelona at the Club World Cup. Now, with their runners-up check, they must rebuild, writes Sam Kelly.
Relive the best moments from the last week of football including shocking results in the Premier League and other action.