Matt Grimes struck on his birthday as Swansea earned a pre-season draw against Borussia Monchengladbach.
Chelsea defender Andreas Christensen has moved to Borussia Monchengladbach in a season-long loan.
Bayern Munich will host Hamburg on the opening weekend when the 53rd Bundesliga season gets under way on August 14.
Borussia Monchengladbach have agreed a deal with Switzerland youth international Nico Elvedi.
Augsburg booked their place in the Europa League next season by beating Borussia Monchengladbach 3-1.
Liverpool give U21s more game time than Premier League rivals but top flight lags behind Europe.