The fullback concedes his side did not hit its stride despite a comfortable win over the Blanquillos, while also giving his take on the club's lack of youth talent.
The Spanish champions appeared to have earned a comfortable victory thanks to goals from Gonzalo Higuain, Angel di Maria, Michael Essien and Luka Modric to move into third place, but the 29-year-old maintained that the emphatic nature of the Blancos' win did not reflect the performance they gave and blamed their fatigued showing on a sudden fixture pile-up.
"We took our foot off the gas." the former Liverpool defender told reporters after the match. "We've had a lot of games recently and we were a little tired."
Arbeloa also gave his opinion on the furore of the club's lack of homegrown talent coming into the first team, which Barcelona coach Tito Vilanova alluded to in a recent press conference.
"The Madrid fans want their team to win. They don't want there to be 10 homegrown players and then finish third in the league," Arbeloa said.
Jose Mourinho's men resume their busy slate with a mid-week UEFA Champions League fixture against Borussia Dortmund.