The Czech insists that if the Blues perform to their best they can handle the brilliant Argentine and believes the reigning European champion is not "invincible"
“[Lionel] Messi in his current form is an enormous threat,” Cech told his personal website.
“He is for sure one of the best players in the world but, as I said before, no team is invincible."
The Argentine forward has been in scintillating form this season, notching over 60 goals in all competitions, including 14 in Europe’s premier club competition.
Cech says Chelsea is well aware of the threat the 24-year-old will pose its defense, but believes the team can defend against him.
“His ball technique is superb but, most importantly, he can react to how the game develops. At the last possible moment in any situation he can find the ideal solution. There are a lot of ways that Messi can finish an attack.
“On the other hand, he is also only human and, if we perform to 100 percent, we will be able to defend against him.'
Cech also concedes that Chelsea is the underdog going into the game, but believes it is not above the Blues to pull off an upset.
“They [Barcelona] are the biggest favorites of the Champions League, they are defending the trophy but anything can happen," he added. “We have two matches in which we can overturn the prognosis about favorites.”