De Rossi has sifted through the excuses as he judges Italy's poor performance against Mexico...
Carlos Vela and Alberto Medina struck twice for the Mexicans, with Leonardo Bonucci offering little hope at the death following his strike to pull one back for the Azzurri.
Despite the loss, De Rossi feels the Azzurri will improve by the time they kick off their World Cup campaign against Paraguay on June 14.
"They played some more games than us and our condition wasn't great tonight," he told the press.
"It was just a test for us, there were no important points up for grabs, but we have to improve and make sure we are in good condition for the tournament."
Lippi tested a number of tactics during the game, switching from 4-2-3-1 to 4-3-3 and 4-4-2 before going back to a 4-2-3-1. But, De Rossi doesn't feel the constant changes made too much of a difference.
"I felt ok, we ran plenty and worked hard and we made an effort, but we are annoyed at losing as one would expect, but we have to improve on a physical level and in general because we felt tired out there," he added.
"I don't know about the tactics, that's down to the coach to analyse. If you're not in form then then you can't really do the tactics too well."
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