Ronaldo is expected back in Madrid today for the first time since making his bombshell last week about being "sad" at the club.
"Nobody is going to doubt his sacrifice and dedication for Real Madrid," declared Arbeloa.
"More and more, Cristiano is seen as being alone on the pitch. He must know that Real Madrid's fans support him. He can't doubt that because it's been shown to him day after day. I think that the fans are very grateful to Cristiano for his work, for his goals, dedication and commitment."