Cesc admits he's spoken with Messi since he suffered his groin injury on Wednesday during their 1-1 draw with Atletico Madrid.
"I spoke to Messi yesterday and he told me he was okay. The truth is I have not noticed him worried," Cesc told Sport.
Following the controversial statements of Argentina coach Edgardo Bauza, who slammed Barca's injury management of Messi, Cesc added: "Barca is the only club in the world who knows how to take care of Messi."
Messi's injury is expected to keep him sidelined for three weeks.