Peter Bosz joked that Pierre-Emerick Aubameyang is a "terrible player" in an attempt to ward off interest from Real Madrid as Borussia Dortmund prepare for their Champions League clash at the Santiago Bernabeu.
Gabon striker Aubameyang has long been linked with the European champions, having spoken in the past of his desire to play for Los Blancos to fulfil a promise made to his Madrid-supporting grandfather.
His latest chance to impress up close comes on Wednesday as Dortmund take on Zinedine Zidane's men knowing it will be their last fixture in the Champions League this season, although they still require a win to guarantee passage to the Europa League.