Capello has provided a witness statement for Terry as the Chelsea captain arrived for day three of his racism hearing.
Terry is facing an FA independent regulatory hearing into a charge that he used racist language towards QPR's Anton Ferdinand in October last year.
He arrived at Wembley Stadium early on Wednesday morning as the case heads towards its conclusion. After eight hours at the hearing, Terry left at around 4.30pm.
Terry will return on Thursday as the hearing enters its fourth day.