Dortmund's Erling Haaland attends the team's first pre-season training session. EPA
Borussia Dortmund's Jude Bellingham attends the team's first pre-season training session. EPA
Dortmund's Jude Bellingham attends the team's first pre-season training session on Monday. EPA
Dortmund's Jude Bellingham, left, and Jadon Sancho, centre, attend the team's pre-season training session. EPA
Dortmund's Axel Witsel, Thomas Delaney and Jude Bellingham vie for the ball during the team's first pre-season training session. The 2020/21 Bundesliga will start on September 18. EPA
Dortmund's Jadon Sancho attends the team's first pre-season training session. EPA
Dortmund's Jadon Sancho, left, trains on Monday. EPA
Borussia Dortmund's 15-year old wonderkid Youssoufa Moukoko during the first training session after the summer break on Monday. Getty
Borussia Dortmund's Youssoufa Moukoko, left, fights for the ball with Julian Brandt during team's first pre-season training session on Monday. AP
Dortmund's Youssoufa Moukoko attends the team's first pre-season training session. All players were required to have two negative coronavirus tests before they could start pre-season training. EPA
Borussia Dortmund’s Youssoufa Moukoko dribbles a ball during a training session. AFP
Borussia Dortmund’s Youssoufa Moukoko, centre, during training. AFP
Dortmund's Youssoufa Moukoko attends the team's first pre-season training session in Dortmund. EPA
Dortmund's 15-year-old player Youssoufa Moukoko, second right, talks to Dortmund's sports director Michael Zorc during the team's first pre-season training session. EPA
Dortmund players go through their warm-up routine on Monday. EPA
Dortmund's manager Lucien Favre attends the team's first pre-season training session. EPA
Dortmund's Julian Brandt, left, attends the team's first pre-season training session. EPA
Borussia Dortmund's goalkeeper Roman Buerki, right, warms up during the team's first pre-season training session in Dortmund on Monday. EPA
Dortmund's Erling Haaland, left, trains on Monday. EPA
Dortmund's Erling Haaland attends the team's first pre-season training session. EPA
Borussia Dortmund's Jude Bellingham attends the team's first pre-season training session. EPA
Dortmund's Jude Bellingham attends the team's first pre-season training session on Monday. EPA
Dortmund's Jude Bellingham, left, and Jadon Sancho, centre, attend the team's pre-season training session. EPA
Dortmund's Axel Witsel, Thomas Delaney and Jude Bellingham vie for the ball during the team's first pre-season training session. The 2020/21 Bundesliga will start on September 18. EPA
Dortmund's Jadon Sancho attends the team's first pre-season training session. EPA
Dortmund's Jadon Sancho, left, trains on Monday. EPA
Borussia Dortmund's 15-year old wonderkid Youssoufa Moukoko during the first training session after the summer break on Monday. Getty
Borussia Dortmund's Youssoufa Moukoko, left, fights for the ball with Julian Brandt during team's first pre-season training session on Monday. AP
Dortmund's Youssoufa Moukoko attends the team's first pre-season training session. All players were required to have two negative coronavirus tests before they could start pre-season training. EPA
Borussia Dortmund’s Youssoufa Moukoko dribbles a ball during a training session. AFP
Borussia Dortmund’s Youssoufa Moukoko, centre, during training. AFP
Dortmund's Youssoufa Moukoko attends the team's first pre-season training session in Dortmund. EPA
Dortmund's 15-year-old player Youssoufa Moukoko, second right, talks to Dortmund's sports director Michael Zorc during the team's first pre-season training session. EPA
Dortmund players go through their warm-up routine on Monday. EPA
Dortmund's manager Lucien Favre attends the team's first pre-season training session. EPA
Dortmund's Julian Brandt, left, attends the team's first pre-season training session. EPA
Borussia Dortmund's goalkeeper Roman Buerki, right, warms up during the team's first pre-season training session in Dortmund on Monday. EPA
Dortmund's Erling Haaland, left, trains on Monday. EPA
Dortmund's Erling Haaland attends the team's first pre-season training session. EPA