French star Marcus Thuram and England international Jadon Sancho joined the protests over racism and police brutality in the United States on Sunday after scoring in the Bundesliga.
Thuram took a knee after scoring for Borussia Monchengladbach in the game against Union Berlin.
Sancho marked his goal for Borussia Dortmund against Paderborn by lifting his jersey to reveal a T-shirt bearing the words "Justice for George Floyd".
On Saturday, Schalke's US midfielder Weston McKennie wore an armband against Werder Bremen bearing the words "Justice for George".
Thuram's gesture echoed past protests by National Football League players in the US in support of the Black Lives Matter movement.
The issue has surged back into the headlines following the death of unarmed black man George Floyd during a police arrest in Minneapolis.
Sancho revealed his protest after scoring in the 57th minute - and was promptly yellow-carded for his troubles.
Thuram, a 22-year-old French striker, continued his recent hot form with two goals as Borussia Monchengladbach beat visiting Union Berlin 4-1.
Because of social distancing rules, goal celebrations were muted but after Thuram headed his team's second goal just before half-time he took the opportunity to make a solitary statement, kneeling and bowing his head.
At half-time, his club tweeted a photo with the caption:
After the game, Gladbach coach Marco Rose said Thuram had his backing.
"Marcus has made the point. He has set an example against racism that we all support," Rose said.
Thuram, whose father, French World Cup winner Lilian runs the Education against Racism foundation in Paris, was the latest show of solidarity with the current protests sweeping the United States.
On Saturday, McKennie said it had been crucial to make a stand.
"To be able to use my platform to bring attention to a problem that has been going on too long feels good!!!" he tweeted.
Meanwhile, in the United States, NFL Commissioner Roger Goodell said there "remains an urgent need for action" as violent protests rocked the country.
"The protesters' reactions to these incidents reflect the pain, anger and frustration that so many of us feel," Goodell said.
"As current events dramatically underscore, there remains much more to do as a country and as a league."
Boston Celtics forward Jaylen Brown returned to his native Georgia to lead a peaceful protest march in Atlanta.
"I drove 15 hours to get to Georgia, my community," Brown said.
"Being a celebrity, being an NBA player, don't exclude me from no conversations at all. First and foremost, I'm a black man and I'm a member of this community."
NBA star LeBron James was among those who contrasted pictures of police officer Derek Chauvin's knee on Floyd's neck with the kneeling protests of former NFL star Colin Kaepernick in 2016.
Kaepernick, who was ostracised by the NFL for kneeling during the national anthem in protest against racial injustice, has launched a fund to pay for legal representation for protesters who need it.
Serena Williams tweeted a video by Nike, which also sponsors Kaepernick, picking out the line:
Two-time Grand Slam tennis champion Naomi Osaka posted pictures of protests from Minneapolis on her Instagram account.
wrote Osaka, whose mother is Japanese and whose father is Haitian.
Rising US tennis star Coco Gauff, a 16-year-old African American, showed on Instagram the faces of black Americans who died in recent years at the hands of authorities or white fellow citizens.
"Am I next?" Gauff asked.