Juve were hammered 5-2 at Galatasaray in the first-leg of their Champions League playoff this week.
However, Capello still gives Juve a chance for next week's return-leg in Turin.
He told La Gazzetta dello Sport: "We're missing a real defender.
"With Bremer gone, the lights went out. But for the return match against Galatasaray, I have hope: the Turks must go to Turin convinced they've already reached the round of 16, making the mistake of underestimating Juve.
"Of course, (Victor) Osimhen and company have remarkable pace, but (Luciano) Spalletti will have to find a way to stem it. I believe the Bianconeri still have a 40% chance of advancing. I believe Juventus will react with pride, and I'm confident."
