Alvarez tweeted that he got carried away and apologised to Messi and the people of Argentina.
Images from the round of 16 match between Argentina and Mexico at the 2010 World Cup.
The summit is being attended by more than 30 heads of state and top officials from the European Union and invited guest countries and 14 heads of international organisations.
Eight years is a long time in the life of an athlete. But just like Messi, Di Maria has preserved and persisted towards his childhood dream, points out Deepti Patwardhan.
In total, he has scored 788 career goals.
Argentina beat Russia 3-2 while Spain ended the reign of defending champions United States, winning the other semi-final 4-1.
The historic Maracana stadium has hosted two World Cup finals, in 1950 and 2014, and saw Messi and his squad become 2021 Copa America champions by beating Brazil 1-0.
A summary of Tuesday's qualification matches next year's FIFA World Cup.
Lionel Messi says Argentina have felt the presence of the late, great Diego Maradona throughout their World Cup campaign, including on Friday when they beat the Netherlands on penalties to reach the semi-finals.
A stunning goal from Angel Di Maria enabled the defending champions beat Nigeria 1-0 in Saturday's final at the Beijing Olympics.
Most of the deaths are related to fights between the barras bravas, Argentina's hooligan firms.
Lionel Messi's Argentina put the love of their fans to a new test in a World Cup qualifier against Paraguay on Friday after the thrill of their captain's nine goals in five games.
A sense of euphoria was in the air in the country, particularly in the Buenos Aires neighborhood of Palermo, where thousands of jubilant fans crowded to watch the match on a giant screen in the park.
Argentina coach Alejandro Sabella is to step down after Sunday's World Cup final against Germany regardless of the result, his agent told Argentine radio on Friday.
An overview of contenders in the race for top scorer at the 2022 World Cup.
"Our team fulfils our dreams!" and "Where is Messi? We beat him!", the green-clad Saudis chanted over and over in the Lusail Stadium, on their feet and greeting every clearance, including one headed off the goal line with a deafening roar.
A round-up of the 2018 World Cup qualifiers played on Thursday
News of all that's transpired on and off the football field
A summary of sports events and persons who made news on Friday
Argentina and the Netherlands will meet in Sunday's final of the women's hockey World Cup after narrow wins in Friday's semi-finals.
Argentina beat the Netherlands 4-3 on penalties on Sunday to win the women's hockey World Cup for the first time.
Diego Maradona disregarded the vast experience of Inter Milan midfielder Esteban Cambiasso and 136-cap record holder Javier Zanetti when he named his 30-man provisional World Cup squad on Tuesday.
Chile advanced to the quarter-finals of the Copa America on Tuesday after two goals in the first half from Eduardo Vargas and two in the second from Alexis Sanchez gave them a 4-2 win over Panama in Philadelphia.
Former England and Tottenham Hotspur defender Ledley King on Tuesday said though Indian football has progressed extensively in the last few years, the country needed to spread the sport more effectively at the grassroots.
The South Americans secured 2-0 victories away to Venezuela and at home to Chile earlier this month to climb above Brazil and Italy in the monthly standings.