Dortmund's new player Thomas Meunier, right, fights for the ball with Jadon Sancho, left, during the first training session of German Bundesliga club Borussia Dortmund at the training grounds in Dortmund, Germany, Monday, Aug. 3, 2020. (AP Photo/Martin Meissner)

Dortmund's Jadon Sancho heads the ball during the first training session of German Bundesliga club Borussia Dortmund at the training grounds in Dortmund, Germany, Monday, Aug. 3, 2020. (AP Photo/Martin Meissner)