Speaking after the Champions League Draw, Begiristain also found time to praise his manager:
"With Ronaldinho - he is not for sale. As for Frank Rijkaard, we are very, very happy with him. He is a great coach and we will keep him."
Meanwhile, Begiristain has issued Celtic with a firm warning after the two clubs were drawn together in the last 16 of the Champions League.
"We must be ready and very focused. The first leg is massively important."