Lionel Messi urled home a fine free-kick in a man-of-the-match performance, scoring the winning goal in Inter Miami's 2-1 win over FC Porto in the FIFA Club World Cup.
Inter Miami started off the FIFA Club World Cup with a draw against Al Ahly.
Javier Mascherano, a FIFA World Cup runner-up in 2014 with Argentina, retired from football on Sunday.
Argentina's most-capped player Javier Mascherano called time on his international career Saturday after the painful World Cup defeat to France.
Argentina face Nigeria in a must-win FIFA World Cup match in Saint Petersburg on June 26.
Icardi, who has played only four matches for his country since his debut in 2013, was rewarded for a superb 28-goal season in Italy's Serie A championship.
Brazilian investment firm DIS, which held 40 percent of Neymar's sporting rights when he played at Santos, had claimed it was cheated out of its real share of the transfer due to parallel contracts that Barcelona and Santos allegedly used to hide the true cost
Neymar and FC Barcelona president Josep Maria Bartomeu will give evidence in the murky case over the deal which brought the Brazilian to the Catalan giants in 2013.
Javier Mascherano was sentenced to one-year in prison for committing tax fraud of 1.5 million euros, but the FC Barcelona and Argentina defender will avoid jail term by paying a fine of 816,000 euros. In Spain, sentences less than two years are normally suspended.
Javier Mascherano, who has played for Barcelona since 2010, was accused by Spain's tax office of concealing part of what he earned in image rights.