The Spain stopper was somewhat surprisingly benched in favour of Raphael Varane for Los Blancos' 3-2 win over the English champions, but the former Liverpool man has leapt to the support of his team-mate.
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"Sergio Ramos is our vice-captain, and one of the best centre-backs in the world," Arbeloa was quoted as saying on the official Madrid website.
"The coach makes the decisions and we have to respect them. Other players like [Mesut] Ozil and [Karim] Benzema did not start either.
"However, they are all still very important for Real Madrid."
Ramos, 26, has made six official appearances for the Santiago Bernabeu side this term.