Borussia Dortmund and Hertha Berlin players took a knee together around the centre circle before their meeting at Signal Iduna Park.
Dortmund players warmed up in T-shirts with messages including "no peace, no justice" and "united together".
Bayern Munich players wore T-shirts which said "red against racism" before their 4-2 win at Bayer Leverkusen.
The Bundesliga leaders also wore armbands which read "Black Lives Matter" during the game.
