And he explained he wanted to give the pair time to settle into a new culture.
"It's not easy for the Germans," he said. "They do not speak a word of Spanish. They can just say 'buenos dias' and 'hola'.
"The work we do is intense and luckily I have an assistant who speaks some German and has given them my instructions.
"But it's not easy for my message to get across as I wish. In addition, the social life of the group is still zero for them.
"Patience. Give them time."