Lionel Messi may have the weight of a nation on his shoulders, but he wasn’t showing it as Argentina returned to training on Wednesday. The South American side scraped into the last eight of the World Cup thanks to an extra-time goal from Angel Di Maria against Switzerland on Tuesday night. Messi was again the architect for La Albiceleste and they now take on Belgium in Brasilia on Saturday. The Barcelona forward was pictured joking with team-mate Fernando Gago as he appeared to take it easy after his exertions the previous night. Taking a more active part was striker Sergio Aguero who missed the Switzerland clash with a thigh strain. The Manchester City man was running with the ball during the training session in Vespasiano. Aguero played in all three of Argentina’s group games but has so far failed to find the net.