Barcelona's Argentinian forward Lionel Messi (R) leaves the pitch with the team's doctor after being injured during the Spanish league football match FC Barcelona vs Atletico de Madrid at the Camp Nou stadium in Barcelona. AFP PHOTO

Barcelona star Lionel Messi will be sidelined for the next three weeks due to a groin strain, dealing a huge blow to his club FC Barcelona and country Argentina. The Argentine captain is set to miss his country's World Cup qualifiers against Peru and Paraguay next month as well as Barca's Champions League clash at Borussia Moenchengladbach.