(CNN)Lionel Messi has urged his teammates to improve in Tuesday's Copa America clash with Uruguay after Argentina "fell asleep" against Paraguay.
Messi's men blew a two-goal lead, drawing 2-2 in their opening Group B match of the South American championship in Chile, while titleholder Uruguay won 1-0 against guest nation Jamaica.
"We played well in the first half, but we fell asleep in the second," said Messi, who scored a 36th-minute penalty soon after Sergio Aguero's opener in La Serena.
Nelson Valdez reduced the deficit from long range on the hour mark and substitute Lucas Barrios snatched an equalizer in the final minute of regulation time.
"We should have put the game to bed," said captain Messi, who came into the tournament after winning a treble of titles with European and Spanish champion Barcelona.
"In the first half we completely dominated possession, but in the second Paraguay took the ball away from us.