Celta Vigo defender Joseph Aidoo has been training alone after suffering a slight physical discomfort.
The 24-year-old has not trained with the group since the side resumed training on Monday.
The Ghana international is not injured but has suffered a physical discomfort since last week.
He has been training outside the group since Saturday due to the situation.
The centre-back took the opportunity to train outside the group, thus leaving coach Oscar Garcia to divide the other 28 players into two groups of fourteen.