Lionel Messi was slapped during Argentina training by teammate Rodrigo de Paul amidst a good-natured sparring session involving the Paris Saint-Germain superstar.
Atletico Madrid midfielder De Paul mouthed: "Are you stupid, Leo?" during the incident, which highlights the strong spirits within the Argentina international squad just months ahead of this winter's World Cup finals in Qatar.
Messi cemented his status as the all-time greatest as Argentina ended their trophy drought last summer by winning the Copa America, defeating Brazil in the final. The nation is now attempting to go one step further by lifting the World Cup for the first time this century.
