Boyd to train with Dortmund's first team

The departure of Mohamed Zidan from Borussia Dortmund has opened the door of opportunity for� U.S. Under-23 national team forward Terrence Boyd.

With Zidan having moved to Mainz during the transfer window,� Boyd and fellow youngster Marvin Duksch have been summoned� from their respective reserve teams by head coach Jurgen Klopp.