Millwall fans booed players as they took the knee before their EFL Championship game against Derby at The Den on Saturday.
It was the first time fans were at the ground since March and the first time spectators had seen players take the knee since it became a custom in the summer.
The practice is in support of the Black Lives Matter movemet.
2,000 fans attended the game in east London and audible complaints were to be heard from the stands as players dropped to the ground.
Millwall booing the knee😐 pic.twitter.com/v3qfXRmf0Z
— Oliver⚒🎄 (@HammerzOliver) December 5, 2020
There were fears before the match that Millwall supporters would take such action, with the players and management confirming they would continue taking the knee regardless.
Before the match, a club statement said:
“We are fully supportive of the efforts in ridding the sport, and society, of all forms of discrimination.
"It is our duty to reinforce the positive messaging.
"Taking the knee, for us, is in no way representative of any agreement with political messaging or ideology.
"It is purely about tackling discrimination.”
Derby won the game 1-0 thanks to a 69th minute goal from the Republic of Ireland's Jason Knight.