Virkus said: "It's a transfer where we normally have no chance - no chance. But he wants to make a fresh start with us. That's why we should be proud that the boy has chosen Borussia. [He can] play as a hanging striker, on the wing, at number 10, or directly behind a central striker."
Speaking on his role, he added: "It's important for competition that you're not tied to one position. He puts pressure on all the forward positions – but he doesn't actually block anyone."
"There's always a bit of residual risk. But we're getting an outstanding young player, something we wouldn't get under normal circumstances."